2025 Christmas Holidays Sudoku Pack

Play the sudokus from the collection
2025 Christmas Pack - 300 Sudokus for Your Holidays

1
4
3
1
5
8
8
9
7
8
9
3
9
7
8
6
3
4
3
6
7
1
2
4
1
5
8
5
9
6
4
very easy
2
1
6
8
2
3
3
7
8
9
3
4
6
7
1
7
9
3
6
1
9
7
1
5
1
3
2
4
5
6
7
9
3
very easy
3
5
4
3
7
9
6
6
1
4
7
1
8
9
5
8
7
3
6
7
2
8
8
2
4
1
6
5
8
6
9
very easy
4
7
3
1
8
2
8
6
7
5
4
2
8
3
9
1
1
7
5
8
6
3
9
5
6
2
1
3
5
7
2
3
7
5
9
very easy
5
9
1
5
8
1
8
7
2
2
3
5
1
9
1
4
9
4
1
2
4
1
9
5
7
8
6
6
7
9
2
3
1
9
4
very easy
6
4
6
5
2
3
1
4
9
6
1
7
8
4
4
2
7
6
7
4
5
6
4
2
9
7
6
1
2
9
5
1
4
8
2
very easy
7
8
1
5
7
8
6
4
6
2
8
1
6
5
9
7
1
3
3
2
7
9
5
2
3
4
1
1
4
2
3
very easy
8
9
2
5
7
1
5
4
3
7
2
8
3
6
5
1
4
3
7
2
4
1
2
3
9
6
7
4
9
5
2
very easy
9
4
3
5
9
5
6
1
2
5
4
9
6
8
5
1
9
2
5
9
3
2
5
8
2
9
7
8
8
7
5
6
very easy
10
9
2
7
3
2
1
1
9
7
5
8
7
8
6
1
2
8
9
5
7
5
4
8
6
2
1
3
4
7
8
very easy
11
4
9
3
5
3
7
9
6
7
9
2
5
6
7
3
7
1
2
5
3
7
9
8
2
4
1
4
3
2
8
9
5
very easy
12
4
2
6
1
9
1
8
6
6
8
9
4
3
2
9
5
4
6
8
6
4
3
2
7
6
9
4
2
7
1
very easy
13
4
3
1
1
2
5
7
8
8
3
4
1
9
5
4
5
9
8
6
9
6
4
8
6
2
5
9
7
1
2
very easy
14
4
6
7
3
7
4
5
6
3
8
6
2
9
9
2
1
3
4
5
3
7
5
4
9
2
3
8
9
4
7
9
8
very easy
15
2
9
8
4
7
5
2
5
7
9
6
9
8
3
8
2
7
9
3
4
7
1
3
8
9
6
1
8
3
7
very easy
16
8
6
1
3
6
2
9
2
8
1
2
8
5
6
7
8
3
2
2
6
5
2
5
7
1
5
2
4
2
3
very easy
17
6
7
3
5
9
9
2
3
1
1
5
8
5
9
3
2
5
1
8
4
5
5
8
7
9
6
4
3
7
8
very easy
18
6
2
3
8
4
8
7
3
8
9
9
2
7
4
2
6
1
1
7
8
7
5
2
2
8
6
3
4
7
5
very easy
19
6
8
2
5
2
4
5
3
5
8
4
3
9
1
9
7
4
2
5
1
9
7
4
7
3
8
1
9
6
4
very easy
20
6
5
4
3
8
7
6
9
7
6
8
4
2
6
5
1
7
9
4
2
3
9
7
8
4
5
6
9
1
5
very easy
21
7
9
5
6
3
6
2
5
1
7
8
6
2
9
5
1
8
7
6
3
5
9
5
4
7
1
8
9
7
1
very easy
22
1
6
5
7
8
3
1
2
1
5
9
6
7
3
4
6
5
6
7
6
2
4
3
1
7
9
3
1
6
2
1
7
9
very easy
23
5
7
9
9
4
3
2
1
9
6
7
5
3
1
3
8
2
5
2
9
4
7
8
1
6
2
9
7
5
6
very easy
24
7
8
5
2
2
8
4
6
4
1
2
8
9
5
9
8
6
5
1
4
3
9
2
9
6
8
1
3
2
8
7
very easy
25
3
2
4
4
8
5
7
5
7
9
2
1
4
8
2
4
9
8
5
8
4
6
2
6
4
8
5
1
5
3
very easy
26
2
3
7
8
5
4
7
1
8
2
6
7
9
8
4
9
3
7
8
5
6
3
4
6
2
7
1
4
5
8
very easy
27
4
7
2
3
1
2
5
6
9
6
8
2
4
7
5
2
4
1
9
5
8
5
3
7
6
4
9
1
8
3
9
very easy
28
1
7
6
5
3
9
1
6
7
2
3
8
1
3
8
6
9
2
1
5
3
4
6
3
4
1
6
1
8
6
4
9
4
7
very easy
29
3
7
1
9
5
8
7
4
6
5
4
6
1
2
5
4
9
8
9
3
5
7
8
2
1
9
6
1
4
3
very easy
30
3
9
6
4
2
7
8
9
6
3
5
9
6
7
5
4
8
6
8
2
9
8
5
1
9
3
7
2
4
9
7
5
very easy
31
1
2
4
2
6
8
4
5
3
9
3
2
4
1
5
3
7
9
2
4
6
9
8
4
1
7
2
5
4
7
6
3
very easy
32
9
2
1
8
5
4
6
7
8
7
3
1
9
6
3
7
1
5
9
7
3
8
6
3
2
2
1
4
7
5
very easy
33
9
3
1
5
4
8
6
9
4
2
6
3
1
8
1
5
3
4
9
1
5
8
7
1
9
2
6
4
6
3
very easy
34
5
1
8
7
4
3
5
9
2
8
2
8
1
6
7
9
3
6
5
1
7
5
9
6
1
4
3
8
5
3
9
6
very easy
35
8
5
2
6
3
7
2
2
5
4
6
7
6
9
2
6
1
4
4
8
6
2
8
3
6
8
1
2
3
7
8
2
very easy
36
1
6
2
9
8
9
4
7
5
7
3
9
1
8
4
2
5
7
3
4
5
6
5
1
3
2
1
7
5
8
very easy
37
8
9
6
7
3
6
5
4
5
4
9
9
3
1
6
9
7
8
7
1
7
5
3
4
7
8
2
1
6
8
4
very easy
38
4
9
7
9
8
5
8
4
6
6
7
4
5
1
7
2
9
6
6
2
3
2
1
7
9
4
6
1
8
3
very easy
39
1
5
8
7
6
8
1
6
2
7
8
6
1
6
4
9
2
4
5
2
6
3
9
1
2
3
4
5
4
3
very easy
40
4
1
6
4
3
8
9
9
2
4
5
9
6
6
4
8
1
7
6
9
2
8
1
5
8
7
4
1
9
3
very easy
41
3
1
8
7
5
5
3
1
9
5
7
8
9
2
9
6
8
3
2
8
1
8
4
7
6
3
8
8
2
7
4
9
very easy
42
8
2
1
4
9
3
2
9
5
5
2
3
4
8
4
3
9
7
4
5
1
6
3
2
8
1
1
5
7
6
very easy
43
8
7
3
3
9
4
2
7
1
6
8
7
9
5
1
2
3
8
6
4
3
9
6
3
4
7
4
6
8
1
3
6
very easy
44
8
4
9
7
2
6
9
8
2
4
4
2
3
2
9
1
7
4
6
3
7
3
1
5
8
6
2
4
3
9
8
very easy
45
3
4
9
8
6
8
9
9
1
3
6
1
3
9
3
5
9
6
1
6
8
5
7
4
1
6
7
3
3
1
8
6
very easy
46
3
9
7
7
4
1
8
3
8
9
6
7
4
7
2
9
8
6
1
4
1
3
8
6
8
9
3
4
1
2
5
8
very easy
47
8
4
9
4
2
3
7
5
7
9
8
3
1
9
1
4
3
2
3
8
4
6
7
9
7
4
9
5
9
5
6
very easy
48
5
4
3
8
1
6
5
3
7
6
9
4
8
9
9
3
6
2
1
4
7
6
1
5
2
9
8
1
9
4
very easy
49
7
2
9
6
8
9
7
1
8
2
9
1
3
8
1
2
6
5
6
4
4
6
9
5
9
2
4
7
2
6
very easy
50
5
3
9
8
8
3
6
2
1
8
7
3
2
5
6
3
9
4
1
3
9
4
5
9
8
1
4
3
8
9
very easy
51
9
7
8
5
1
8
2
9
7
3
4
2
8
4
7
6
9
5
2
3
1
1
4
8
9
8
5
2
1
5
2
1
3
9
very easy
52
4
2
3
5
9
9
4
6
3
7
5
1
2
8
1
4
5
1
4
6
9
7
9
2
4
8
5
7
2
6
1
very easy
53
7
4
3
9
6
7
5
1
5
3
1
2
3
8
1
6
2
3
7
1
5
6
2
4
5
6
3
2
3
8
4
very easy
54
2
9
5
8
4
8
3
5
5
3
1
7
7
2
6
3
2
6
1
7
5
6
8
9
1
2
8
5
9
6
7
very easy
55
3
4
5
7
7
8
1
1
9
6
7
3
6
4
7
2
5
9
6
8
6
4
9
4
3
5
1
8
4
3
very easy
56
2
1
7
8
9
6
7
2
8
2
3
3
9
6
8
1
4
6
4
1
9
2
9
4
1
2
3
6
4
4
1
8
very easy
57
7
4
8
3
9
2
1
4
3
8
5
9
7
2
3
6
1
4
4
5
2
4
7
8
1
5
1
2
4
6
9
2
5
very easy
58
3
9
8
5
1
3
4
4
9
5
6
7
7
2
8
9
4
5
5
6
9
8
6
4
2
3
7
5
6
9
7
3
very easy
59
7
8
3
1
5
7
8
2
5
7
4
9
5
1
9
6
6
1
8
5
3
9
8
2
7
6
5
1
6
4
very easy
60
5
7
9
5
4
8
6
1
1
9
5
7
4
5
2
9
7
6
3
2
3
1
9
1
9
8
3
9
5
7
2
8
2
1
very easy
61
6
2
3
7
4
6
7
6
1
5
3
4
7
7
1
4
5
9
7
1
6
9
4
5
5
6
8
3
7
5
easy
62
2
8
3
9
4
6
7
6
3
6
1
8
2
1
8
9
7
9
8
1
5
6
4
2
5
easy
63
1
2
9
7
5
1
2
2
9
8
1
2
5
4
9
1
4
6
7
7
8
3
2
9
1
7
3
2
easy
64
7
9
6
9
8
8
2
6
5
7
9
5
3
3
6
2
7
8
9
5
7
6
1
7
4
5
1
8
easy
65
6
1
7
9
5
2
4
5
3
6
8
2
9
4
5
5
9
4
8
3
9
1
4
3
6
2
9
4
easy
66
5
9
6
2
4
3
9
1
8
3
5
6
6
2
9
4
3
7
2
1
3
9
4
6
5
8
5
7
6
9
easy
67
5
7
7
2
6
8
3
1
2
3
4
2
4
2
7
8
9
6
5
9
2
6
7
4
9
8
2
1
8
1
easy
68
3
8
2
5
6
5
2
8
4
4
2
4
9
5
8
4
5
1
7
1
7
9
3
4
6
7
5
9
easy
69
5
8
2
1
2
6
5
2
7
9
3
4
5
2
3
1
7
7
2
5
3
4
2
5
5
8
9
2
4
1
easy
70
9
1
6
8
4
5
2
5
8
3
2
1
3
9
4
8
3
5
9
6
9
8
1
5
9
2
8
6
easy
71
1
9
2
6
4
8
5
2
1
8
3
2
2
1
8
4
5
7
6
1
5
9
3
2
3
6
easy
72
4
8
7
7
5
8
3
1
8
5
4
3
2
6
1
7
3
6
6
3
9
2
1
2
4
3
easy
73
9
7
1
7
3
9
9
3
2
5
1
3
4
5
6
2
7
2
9
8
4
6
5
2
6
8
easy
74
5
1
4
6
9
8
5
6
5
2
3
2
6
1
2
3
4
9
5
3
4
8
3
5
4
6
4
8
easy
75
6
3
2
7
5
1
9
7
3
6
1
3
9
5
2
6
9
3
5
3
5
6
7
8
8
4
easy
76
7
1
6
9
3
1
9
2
3
3
5
7
8
1
7
4
1
4
6
8
2
6
3
4
5
2
6
3
easy
77
3
6
4
3
8
7
1
3
6
7
8
4
8
3
6
7
1
4
5
2
8
4
6
2
5
7
6
8
1
easy
78
6
8
9
3
7
5
4
3
5
6
6
4
9
9
5
6
5
3
7
3
1
4
9
1
8
5
4
7
easy
79
3
5
1
5
6
2
4
1
4
8
6
2
5
1
4
8
3
8
8
1
5
7
6
2
easy
80
5
7
4
1
2
3
6
8
7
4
7
1
1
5
2
6
1
5
7
5
2
2
3
6
5
7
4
easy
81
2
8
9
7
8
2
3
4
7
6
8
6
7
2
5
7
9
4
9
6
7
2
1
6
9
8
5
3
easy
82
1
4
6
8
1
6
7
3
8
4
8
1
7
8
2
5
1
5
7
3
9
2
5
3
7
9
6
4
easy
83
4
5
9
6
7
5
1
2
3
3
9
7
8
5
1
3
6
8
3
5
1
9
3
6
1
2
easy
84
7
6
6
9
1
2
8
8
7
1
9
8
1
5
9
2
1
5
1
5
4
9
7
4
8
5
4
5
easy
85
6
4
1
3
2
5
6
2
5
8
6
3
6
7
9
4
9
3
7
5
4
2
8
5
5
3
9
4
easy
86
6
8
1
4
3
4
6
7
2
5
1
3
9
2
7
5
1
3
9
1
3
8
5
8
6
3
1
easy
87
8
9
4
6
1
3
9
9
2
5
7
3
6
2
9
1
7
5
9
6
8
5
9
9
7
6
3
easy
88
6
4
9
5
9
7
2
1
6
2
7
5
3
8
7
3
5
9
4
7
8
8
3
2
4
7
1
7
3
8
easy
89
6
9
4
5
1
4
5
2
7
1
6
3
4
1
8
9
6
1
9
7
4
9
5
1
easy
90
1
6
5
2
1
9
6
4
1
5
9
6
9
6
4
2
8
3
5
9
5
1
6
3
5
2
1
3
easy
91
6
4
8
6
7
7
8
4
7
3
4
5
4
1
3
9
2
8
5
7
4
8
2
9
7
5
6
8
easy
92
5
6
4
3
4
2
9
6
3
2
3
6
9
2
1
2
3
1
9
8
9
4
6
3
2
5
1
9
2
4
easy
93
9
4
8
5
9
9
1
3
8
9
2
3
8
6
7
9
2
3
5
4
7
5
2
3
8
9
8
2
easy
94
5
9
6
6
5
9
4
8
3
1
8
7
3
5
9
4
5
8
2
7
1
6
3
8
6
4
easy
95
1
7
2
7
5
8
4
3
1
3
5
1
1
6
2
9
3
2
5
7
9
2
8
7
6
4
easy
96
8
3
2
9
1
7
1
3
4
4
9
8
9
4
1
8
6
5
2
1
4
6
4
1
3
5
7
9
1
2
easy
97
4
8
6
2
6
9
1
1
4
8
3
1
8
2
9
1
2
9
3
9
6
3
5
4
2
8
7
8
6
3
easy
98
7
9
8
2
3
1
6
8
6
2
7
2
8
2
6
8
4
6
5
3
9
5
8
7
5
4
2
easy
99
2
4
3
8
3
6
9
7
5
5
6
1
2
3
7
9
1
2
3
1
5
7
6
5
8
2
easy
100
1
9
5
4
7
2
4
8
7
9
4
7
1
9
3
8
2
8
2
1
6
7
5
8
9
easy
101
8
1
4
3
3
6
5
2
8
3
5
8
7
3
1
5
3
6
7
1
5
1
6
8
3
9
8
4
easy
102
9
3
8
6
9
5
2
8
1
4
9
2
1
3
2
9
4
7
1
6
7
9
3
4
8
7
8
4
2
easy
103
1
9
4
5
9
7
5
4
5
1
4
1
7
3
1
8
2
3
9
4
3
8
1
5
3
6
6
9
4
5
easy
104
6
1
2
4
5
5
9
8
9
5
8
8
3
9
6
7
8
5
1
3
6
7
5
2
6
1
easy
105
6
4
9
2
7
9
6
1
8
9
5
7
6
4
2
3
8
6
4
5
3
7
3
1
9
4
easy
106
1
7
8
6
8
9
3
9
1
2
8
5
6
7
8
4
2
5
7
6
6
5
6
4
9
8
easy
107
3
9
6
2
1
5
3
1
5
2
2
5
6
3
8
1
6
4
3
6
7
8
2
9
6
3
easy
108
9
2
3
1
4
5
8
5
9
4
1
5
3
6
2
9
2
8
4
7
4
8
6
1
2
9
9
1
easy
109
5
4
8
3
9
8
7
1
6
2
4
7
8
2
9
1
4
7
9
6
1
2
9
5
3
easy
110
9
4
1
3
6
7
5
2
9
5
6
4
7
8
5
9
4
7
5
2
7
4
8
2
5
1
3
6
easy
111
8
4
3
3
2
7
2
3
4
4
3
1
7
1
5
8
6
4
9
7
3
8
8
5
1
5
4
6
6
1
5
easy
112
4
1
8
6
5
9
7
1
8
2
6
5
8
6
4
2
2
3
9
8
1
5
5
6
8
2
5
8
9
easy
113
5
3
1
8
2
7
6
1
8
3
6
5
7
8
5
9
1
7
1
6
8
2
5
1
easy
114
8
5
3
6
9
7
1
5
2
4
3
6
5
1
5
4
9
2
9
3
1
6
1
4
1
2
easy
115
3
8
4
4
1
8
2
1
6
1
4
7
5
2
6
7
8
9
6
1
7
5
9
5
3
4
7
9
easy
116
3
8
4
7
2
5
3
6
9
1
9
1
4
1
6
8
4
2
4
2
6
9
7
5
9
5
2
4
easy
117
4
2
5
7
9
7
9
4
1
8
9
4
1
6
7
9
6
5
5
4
3
2
3
6
9
2
easy
118
9
6
8
8
2
6
4
3
5
3
7
4
8
9
9
6
9
7
8
5
6
2
9
5
1
7
8
2
5
8
easy
119
3
7
1
9
4
5
2
8
7
5
7
8
5
3
8
4
9
2
7
9
8
4
5
7
2
1
easy
120
1
2
4
7
5
4
1
6
2
5
2
7
8
9
3
1
5
4
1
4
9
6
3
9
1
5
easy
121
8
1
2
7
4
4
9
3
8
7
2
8
5
3
7
9
2
5
1
3
8
5
4
5
1
1
7
6
moderate
122
5
8
4
2
9
7
2
6
3
9
5
8
7
5
9
3
7
9
8
6
1
4
4
8
2
5
7
5
moderate
123
7
1
3
8
6
9
8
3
7
6
5
4
8
5
1
5
4
8
7
9
5
4
4
3
2
7
moderate
124
8
9
7
5
8
7
3
5
4
1
2
4
4
2
5
6
9
7
8
3
6
6
4
8
9
5
8
1
moderate
125
2
8
9
5
5
2
3
3
7
3
8
1
9
9
2
7
2
3
6
6
7
7
8
5
1
9
3
4
moderate
126
6
1
8
6
6
8
4
5
7
2
8
4
5
6
1
8
7
9
9
6
9
6
3
4
2
1
7
5
9
7
moderate
127
7
2
3
9
1
8
1
6
1
3
2
7
6
1
4
8
5
9
6
4
3
4
5
7
1
9
7
2
moderate
128
4
6
8
5
9
1
3
3
4
5
1
4
3
6
2
9
1
9
2
1
4
8
9
6
1
6
5
8
3
9
2
moderate
129
9
6
8
2
9
8
7
3
2
5
1
9
5
4
2
8
1
8
2
5
4
7
6
3
9
2
5
moderate
130
3
6
1
8
8
1
5
5
3
2
9
6
5
7
2
6
4
1
1
3
2
4
3
5
6
8
4
5
moderate
131
3
9
6
2
5
3
7
5
8
7
4
5
1
1
6
6
1
3
2
2
9
1
8
1
2
2
4
8
moderate
132
1
5
3
4
4
5
8
2
9
5
3
1
4
7
4
3
9
9
8
7
1
3
5
2
6
1
5
8
1
5
moderate
133
7
5
9
5
7
1
9
3
6
2
4
1
6
3
8
5
7
3
9
9
5
6
7
4
2
8
3
1
moderate
134
8
7
2
9
1
8
7
6
3
1
2
5
3
4
6
4
8
2
6
7
1
2
4
6
9
5
3
6
moderate
135
3
7
4
1
9
6
7
2
5
5
7
1
3
8
1
4
9
6
7
6
5
1
1
8
3
4
4
8
moderate
136
9
2
7
6
1
3
7
1
3
2
7
8
3
3
1
8
9
4
6
2
4
7
6
3
7
5
7
5
9
8
2
5
moderate
137
7
6
2
1
5
4
6
3
7
3
5
2
9
2
4
5
2
6
4
7
5
7
1
9
moderate
138
5
8
9
4
1
3
9
8
9
3
5
8
2
7
4
8
9
6
3
7
4
3
3
5
2
7
2
5
4
1
moderate
139
2
6
9
2
5
8
3
5
4
2
4
3
2
1
7
8
9
1
9
5
8
1
1
6
2
6
8
moderate
140
1
3
4
7
9
1
8
5
9
3
6
5
4
2
1
3
4
2
8
7
1
5
6
7
4
3
5
6
moderate
141
7
4
6
8
5
1
9
2
3
4
7
1
2
6
1
8
4
7
9
3
4
5
9
7
8
3
1
9
moderate
142
2
5
7
1
4
2
9
5
6
1
5
7
8
5
3
3
4
7
5
3
2
1
6
4
9
2
moderate
143
7
1
2
4
7
9
6
3
8
1
7
9
4
6
7
3
2
1
3
7
8
9
5
4
1
7
9
5
6
7
moderate
144
5
1
7
4
9
5
7
6
8
5
3
1
4
5
7
8
2
2
2
6
8
7
2
5
6
1
4
2
moderate
145
6
3
4
9
7
6
7
2
4
1
6
9
2
8
5
8
2
6
8
3
7
4
3
7
2
9
8
5
moderate
146
1
8
8
5
9
9
6
1
7
6
8
2
7
1
3
5
3
8
1
1
7
9
4
4
8
7
9
5
moderate
147
2
7
6
4
2
5
7
1
6
3
7
4
5
5
2
1
7
8
4
4
9
1
8
6
5
9
5
3
moderate
148
2
1
6
7
1
9
7
4
1
3
6
2
9
8
3
5
6
4
9
4
7
2
8
1
6
3
2
9
moderate
149
6
1
5
3
5
2
1
4
3
5
6
2
2
6
3
8
1
4
7
8
4
8
6
5
1
5
2
7
moderate
150
2
3
7
9
1
4
2
8
3
9
8
8
1
3
9
2
6
5
8
7
9
2
8
4
6
5
moderate
151
5
6
2
4
7
8
3
3
1
8
1
1
8
3
2
4
6
5
4
3
5
6
3
7
7
9
6
4
moderate
152
2
3
4
8
5
7
2
8
6
2
8
2
9
3
6
7
9
4
3
8
7
5
3
6
3
8
2
6
3
8
5
moderate
153
3
6
9
9
2
8
1
1
2
8
4
7
1
9
6
2
8
2
7
5
6
9
7
6
3
4
5
7
moderate
154
8
1
7
9
5
9
7
8
3
5
7
2
6
8
4
9
2
5
5
6
7
6
7
9
1
4
moderate
155
4
1
8
7
6
9
5
6
1
6
8
5
3
7
1
6
4
9
3
9
7
7
5
1
9
5
1
8
3
2
moderate
156
7
3
6
1
5
9
4
2
1
3
7
6
9
1
8
5
6
7
3
4
8
6
5
8
7
1
3
2
moderate
157
1
6
8
9
5
6
7
3
7
1
9
5
8
2
5
4
8
2
9
7
3
9
1
4
9
8
9
6
4
3
moderate
158
8
4
2
7
9
6
2
5
1
2
5
6
6
9
3
4
3
6
9
1
9
3
7
5
1
7
8
moderate
159
1
4
4
1
5
9
8
2
9
3
4
5
2
5
6
8
9
7
7
6
2
5
3
1
9
3
7
6
6
5
moderate
160
1
3
5
7
4
3
6
8
4
3
2
4
8
2
9
5
7
2
3
5
8
2
7
4
8
1
moderate
161
8
1
9
1
4
6
2
8
4
7
6
3
5
7
5
1
9
6
3
5
9
8
4
1
8
3
7
6
moderate
162
8
6
1
5
1
4
7
3
5
2
7
6
4
4
9
7
4
5
2
1
5
2
6
1
2
9
8
7
moderate
163
3
7
4
8
2
9
7
6
5
4
3
1
8
6
2
9
2
4
9
6
1
5
2
1
5
7
moderate
164
2
3
5
6
9
2
8
9
5
7
5
6
6
7
9
1
8
1
4
6
9
4
4
3
2
8
1
3
moderate
165
4
6
3
7
1
6
9
8
2
5
7
1
7
6
2
8
1
9
7
3
2
4
1
6
4
3
moderate
166
5
8
9
5
4
6
6
8
1
6
7
1
8
5
7
6
2
3
1
3
4
4
2
7
9
4
7
moderate
167
4
1
5
6
2
8
7
4
2
4
1
8
1
5
8
4
8
3
1
9
9
6
1
3
9
6
4
1
moderate
168
2
4
7
1
6
4
6
8
2
2
9
1
9
8
1
6
6
5
9
5
1
3
7
6
3
7
2
6
moderate
169
2
8
5
4
3
2
9
2
7
4
1
6
9
8
3
3
1
7
5
7
8
1
2
6
moderate
170
6
3
2
5
6
3
7
1
2
9
8
6
7
1
5
8
6
4
9
2
5
8
7
3
9
8
1
3
moderate
171
6
1
9
6
3
8
3
7
2
2
9
4
5
8
5
6
2
3
4
8
4
5
1
6
9
1
moderate
172
4
7
1
9
4
8
4
7
1
9
2
1
4
7
5
1
6
2
3
8
1
7
9
8
8
6
5
4
2
moderate
173
5
7
2
8
6
6
7
9
1
5
9
8
1
5
7
3
2
2
7
3
1
5
3
4
8
moderate
174
8
3
4
8
5
6
7
1
1
2
5
3
9
8
7
3
5
4
7
6
1
8
8
5
6
7
2
9
8
1
moderate
175
4
2
5
9
3
1
9
4
4
1
3
2
6
8
7
9
8
9
7
4
1
5
5
1
9
8
8
6
3
7
moderate
176
4
9
7
2
8
3
7
1
4
9
3
1
8
1
6
3
2
8
9
5
7
9
1
2
3
8
5
9
moderate
177
7
3
2
1
9
9
5
1
6
7
9
8
3
1
5
2
4
2
3
9
4
5
1
5
1
7
3
5
moderate
178
4
2
9
1
4
9
7
8
6
7
8
5
5
8
6
9
5
7
6
1
3
5
3
9
9
5
2
moderate
179
3
1
5
4
1
2
3
6
9
3
5
4
4
6
8
3
2
9
9
4
5
4
1
7
6
9
7
6
8
5
moderate
180
1
3
6
7
8
1
4
2
1
7
4
5
1
2
3
8
5
6
1
1
4
4
7
6
9
5
3
moderate
181
5
9
7
1
4
9
3
6
3
7
5
8
4
8
2
6
9
4
8
7
7
9
1
3
9
4
7
4
difficult
182
6
8
1
6
9
3
2
9
8
7
4
8
4
7
6
1
4
9
8
5
9
2
6
4
6
7
5
9
8
5
difficult
183
6
5
4
3
2
5
2
3
6
8
1
9
5
7
8
3
9
4
3
7
9
6
1
4
8
1
3
5
4
6
difficult
184
3
7
4
1
1
3
2
8
1
3
8
9
5
3
6
9
9
2
4
4
2
6
3
6
5
9
5
3
8
difficult
185
2
5
3
2
7
6
1
5
6
5
1
8
7
4
1
2
3
7
6
8
3
2
5
9
7
5
4
difficult
186
3
8
7
2
6
4
1
4
6
5
3
2
6
8
5
9
2
7
1
3
9
5
6
4
2
9
difficult
187
5
4
5
3
8
1
3
6
5
8
3
7
5
5
1
8
9
2
8
5
8
6
2
7
1
3
difficult
188
9
3
8
2
4
3
1
4
9
7
4
2
8
3
4
7
5
6
6
4
8
6
4
5
3
7
1
5
3
9
difficult
189
6
7
5
8
1
8
3
5
9
2
8
2
1
2
3
4
3
8
9
6
3
5
9
1
5
1
9
4
difficult
190
7
4
9
3
8
9
4
6
5
1
8
1
4
3
2
6
2
7
6
6
1
2
1
9
4
3
difficult
191
5
8
4
3
9
1
7
2
6
7
4
2
2
8
3
4
1
1
3
4
2
3
9
3
4
5
difficult
192
8
1
9
7
5
2
9
8
7
2
8
6
1
6
6
5
3
9
3
5
9
1
7
5
4
2
difficult
193
4
8
8
9
3
4
1
7
1
6
8
4
5
7
3
6
5
4
2
3
3
4
8
2
6
7
6
5
difficult
194
2
9
9
3
2
7
5
3
4
9
6
1
1
3
6
8
7
8
9
6
7
4
8
2
5
6
2
7
difficult
195
7
9
5
8
1
1
9
6
4
5
2
9
3
6
1
7
5
1
5
2
6
8
6
7
3
8
1
9
6
2
difficult
196
9
6
2
5
7
8
8
3
6
3
9
5
9
1
8
8
2
5
8
1
3
4
1
6
1
3
difficult
197
5
7
8
1
2
1
2
6
7
4
8
3
9
2
2
3
4
6
8
3
7
6
9
8
3
7
difficult
198
9
1
6
2
8
3
3
7
9
2
3
4
7
2
1
2
6
3
6
8
7
5
3
2
9
1
difficult
199
7
3
5
6
9
7
4
9
6
1
1
4
6
7
9
2
6
1
5
8
8
6
2
9
5
2
5
5
3
7
difficult
200
5
9
8
2
8
2
5
4
3
9
8
6
7
4
3
3
8
7
2
6
6
9
3
2
5
7
2
4
difficult
201
5
5
8
1
7
1
4
8
5
9
2
4
3
6
7
9
3
1
5
7
4
1
9
6
6
3
2
1
8
difficult
202
3
7
9
5
5
3
8
4
7
6
1
2
4
3
7
7
2
5
9
1
6
8
2
4
5
2
difficult
203
2
8
3
1
4
7
7
3
1
5
5
9
3
6
2
4
8
4
6
4
7
1
4
2
7
6
difficult
204
9
1
8
2
7
4
2
6
4
2
9
9
2
1
7
1
3
8
7
1
3
4
5
8
6
difficult
205
4
5
6
9
7
8
3
3
1
5
5
7
1
6
7
2
1
8
6
1
9
3
5
9
6
2
3
1
difficult
206
8
5
6
1
9
3
2
4
4
7
1
2
8
6
1
5
7
5
9
1
4
3
6
8
difficult
207
3
1
6
1
7
9
2
1
5
6
7
2
2
8
6
3
9
5
4
3
8
7
3
4
5
8
1
difficult
208
6
3
4
3
9
5
8
1
9
8
6
4
3
3
6
1
6
5
7
4
8
2
6
7
9
1
5
3
difficult
209
9
5
6
9
6
4
7
2
3
5
1
4
3
2
6
8
3
6
9
1
9
3
5
7
3
4
difficult
210
7
9
1
3
1
2
5
7
2
8
1
3
2
7
6
4
8
2
6
9
3
9
4
1
difficult
211
6
1
3
7
8
5
1
6
9
8
1
7
9
4
3
4
7
3
6
9
7
6
4
2
7
7
2
1
5
3
difficult
212
1
3
6
5
7
6
2
8
1
8
9
6
9
7
5
8
4
9
1
2
8
2
4
3
8
6
7
difficult
213
1
9
2
8
7
5
8
6
1
2
9
4
6
8
3
2
2
9
1
7
8
9
9
4
1
6
3
4
difficult
214
4
8
6
3
9
1
4
7
5
5
7
5
7
4
6
8
3
7
8
6
2
4
2
7
1
6
difficult
215
6
3
7
5
9
1
8
6
6
1
2
8
9
9
7
8
5
4
3
1
5
7
8
2
7
1
difficult
216
3
9
7
2
9
8
1
5
6
9
8
5
2
3
8
4
7
9
3
1
5
2
1
8
5
9
7
difficult
217
1
3
9
5
7
9
8
6
1
3
4
6
7
8
4
9
3
5
6
2
5
5
4
3
4
5
8
2
difficult
218
1
6
3
5
9
8
1
7
6
8
2
3
7
8
7
1
9
4
7
9
7
2
8
4
7
5
3
8
4
6
difficult
219
1
4
5
7
7
9
6
2
8
7
6
2
9
5
3
2
9
7
2
6
5
8
8
2
3
4
difficult
220
9
8
3
1
4
4
3
7
7
6
1
9
6
5
9
7
3
1
2
8
4
1
5
7
7
1
difficult
221
8
2
5
3
7
7
6
5
1
1
6
3
5
2
7
7
3
5
1
8
7
1
2
9
4
5
8
6
difficult
222
3
5
8
7
9
2
7
4
8
5
3
2
6
7
5
8
6
1
7
6
5
8
7
4
6
5
8
3
difficult
223
4
5
2
6
3
5
7
8
9
1
6
7
2
9
4
3
8
5
8
4
1
3
4
1
7
2
8
difficult
224
9
5
6
8
9
7
6
7
2
3
8
1
6
2
3
3
2
9
8
6
7
2
8
7
3
3
6
1
difficult
225
4
3
8
1
9
7
5
1
3
5
3
7
9
3
9
7
2
6
1
5
4
5
2
1
4
2
difficult
226
1
3
9
9
5
7
8
3
7
6
2
8
6
5
2
7
4
6
4
5
9
5
7
4
7
1
9
5
9
2
difficult
227
4
1
5
4
2
9
1
6
1
7
3
5
9
7
6
4
4
5
4
3
6
8
7
6
4
2
difficult
228
3
4
1
9
5
4
8
2
8
2
9
3
1
6
8
2
1
6
9
7
8
3
8
2
5
6
3
9
1
2
difficult
229
5
6
2
7
8
5
6
3
4
1
6
7
4
1
9
8
6
3
3
6
9
9
5
2
3
4
6
6
1
5
4
difficult
230
1
4
9
2
3
9
2
7
6
4
8
3
1
7
8
2
5
9
5
6
1
4
1
5
3
8
6
difficult
231
1
8
9
5
6
6
1
7
2
1
3
4
3
8
2
8
5
8
4
6
9
4
1
2
6
3
difficult
232
6
3
9
2
7
5
8
7
1
6
5
1
7
3
7
8
2
1
9
2
8
4
1
7
4
6
3
1
difficult
233
7
9
4
8
6
7
9
1
2
4
1
4
8
3
5
2
1
9
1
8
6
8
7
3
difficult
234
3
9
6
8
5
9
1
3
5
9
6
1
1
3
2
5
4
6
2
7
9
2
8
2
4
7
difficult
235
6
2
8
6
2
7
1
4
3
2
8
4
1
7
9
3
3
2
9
3
5
1
5
9
7
6
3
difficult
236
2
5
2
3
1
5
6
5
8
7
2
9
3
7
1
6
1
4
3
6
3
8
2
9
4
2
6
3
1
3
difficult
237
6
9
1
3
5
7
4
2
3
5
4
7
1
8
5
2
4
6
7
9
6
7
5
3
1
2
difficult
238
8
2
5
1
7
6
4
3
5
9
2
6
4
1
9
5
5
9
1
3
2
6
7
4
difficult
239
7
4
9
3
4
5
6
7
5
9
1
5
6
5
2
3
7
3
1
7
8
6
3
4
6
8
difficult
240
4
3
9
8
2
4
6
9
2
8
7
3
4
9
5
7
4
2
1
1
7
8
5
1
9
6
4
6
difficult
241
9
3
3
6
9
4
8
2
5
6
7
8
1
5
6
4
9
1
2
4
8
2
1
7
1
3
very difficult
242
3
7
5
2
7
1
7
8
2
4
9
5
7
3
8
1
1
2
8
9
7
5
5
6
4
2
6
very difficult
243
3
6
4
2
1
8
9
6
4
6
4
2
8
3
5
1
7
3
1
9
8
9
5
3
3
4
7
very difficult
244
8
9
7
3
9
4
6
5
3
5
1
9
6
7
9
6
1
5
3
5
2
8
1
5
4
9
4
very difficult
245
9
3
6
9
2
6
8
3
7
9
2
8
1
4
2
4
4
6
8
2
6
1
4
8
5
3
6
5
4
7
very difficult
246
5
6
8
6
4
5
9
1
2
1
8
3
2
9
5
3
7
6
7
9
5
3
4
6
9
2
very difficult
247
4
8
9
5
1
6
8
2
4
5
2
9
9
1
7
6
4
2
6
5
7
3
1
8
4
9
7
very difficult
248
9
6
3
2
7
1
8
4
7
6
8
4
8
1
5
2
1
3
7
1
3
2
7
9
6
5
very difficult
249
2
4
7
3
6
5
9
8
3
4
8
7
3
9
1
4
7
8
1
9
5
1
1
2
very difficult
250
4
6
5
5
8
4
5
1
8
4
4
7
1
8
3
5
9
8
7
2
7
3
6
1
3
7
very difficult
251
7
3
5
8
4
4
8
6
9
4
3
5
5
2
1
9
6
2
8
1
7
1
2
7
5
4
very difficult
252
3
2
8
5
9
4
8
6
7
6
2
7
1
3
8
5
4
6
1
5
3
9
9
2
very difficult
253
8
6
4
4
9
2
1
4
7
9
1
3
4
8
9
1
7
5
3
7
2
7
9
4
2
3
5
very difficult
254
9
3
5
6
4
4
9
5
6
8
6
1
7
9
2
1
6
3
1
4
3
1
2
3
8
2
9
1
very difficult
255
8
6
1
4
5
3
9
1
2
1
8
4
3
8
4
3
9
2
1
6
8
9
6
7
5
4
very difficult
256
9
7
3
6
8
1
7
1
4
9
3
8
7
8
1
9
2
9
6
9
5
7
5
9
1
4
4
6
very difficult
257
6
7
3
9
8
6
4
5
6
2
4
2
5
7
9
7
5
2
8
9
8
5
3
4
1
very difficult
258
6
3
2
5
3
4
1
5
7
9
7
6
2
6
9
2
5
3
8
6
9
3
9
2
9
8
5
7
6
8
very difficult
259
3
2
5
7
6
8
2
7
6
3
2
2
8
6
1
7
9
4
9
1
4
7
6
4
7
1
2
very difficult
260
7
6
5
9
2
6
1
6
3
7
4
7
9
1
5
7
3
9
1
4
5
8
3
4
4
2
9
3
4
2
very difficult
261
9
2
1
6
8
7
9
9
8
7
1
3
4
2
9
6
3
6
4
9
2
6
8
5
2
1
very difficult
262
9
1
5
6
2
2
4
7
2
5
3
5
9
4
8
1
8
5
9
8
5
5
2
4
6
7
very difficult
263
9
1
2
8
9
6
8
6
4
8
4
7
4
7
3
3
5
2
5
1
7
6
2
3
4
8
5
very difficult
264
2
6
3
8
9
3
6
7
6
4
2
8
8
2
3
4
1
7
5
3
9
6
1
6
7
4
9
1
7
8
very difficult
265
1
2
9
3
7
6
1
8
5
8
9
1
5
7
7
4
3
2
3
7
4
5
6
8
7
2
very difficult
266
9
1
4
3
3
2
8
2
5
9
8
5
5
8
9
2
6
4
8
1
2
7
6
9
9
7
4
5
very difficult
267
6
8
1
4
2
9
7
8
6
8
7
4
3
5
6
2
6
1
5
7
4
6
7
4
2
9
3
1
very difficult
268
6
7
4
2
6
3
8
3
7
4
1
9
8
4
1
5
7
1
8
4
3
9
2
8
6
8
2
4
very difficult
269
1
3
2
8
6
2
5
8
5
8
3
7
6
8
1
4
4
7
6
9
6
5
8
7
4
2
6
5
very difficult
270
9
2
7
9
2
3
3
6
8
8
6
5
3
4
5
2
3
1
7
5
7
3
9
2
9
1
very difficult
271
2
8
6
8
2
1
3
9
8
5
4
2
4
7
2
5
9
7
1
7
9
2
4
8
2
4
very difficult
272
8
9
9
8
6
4
6
1
8
6
1
5
8
2
6
2
4
1
5
9
4
3
3
2
9
1
7
6
very difficult
273
4
6
9
3
2
6
7
6
2
5
4
3
5
6
9
7
1
6
5
1
9
8
4
7
7
6
8
very difficult
274
7
9
8
2
5
6
4
9
3
4
5
9
6
2
5
1
9
3
2
4
6
5
4
5
4
very difficult
275
8
1
9
7
1
1
2
9
2
9
5
3
3
5
8
9
8
4
5
2
9
5
2
1
8
2
3
4
very difficult
276
9
5
1
2
6
1
9
1
6
8
5
6
2
7
9
1
4
3
5
6
3
8
1
4
6
7
5
2
very difficult
277
1
2
4
2
6
5
9
6
3
6
5
5
8
5
8
4
2
1
9
6
8
2
7
3
very difficult
278
2
3
6
1
8
9
8
7
6
2
6
1
3
3
1
8
2
8
3
7
7
9
3
4
4
9
6
1
5
very difficult
279
5
9
4
7
2
8
2
7
1
5
1
8
6
6
5
4
7
3
3
1
9
2
1
7
3
8
9
very difficult
280
1
4
9
3
6
8
2
3
5
3
7
8
1
6
5
9
5
2
2
7
7
6
4
5
1
very difficult
281
1
9
6
5
8
1
8
3
7
6
9
4
4
6
2
6
3
7
8
7
2
3
7
7
5
9
very difficult
282
5
2
7
5
3
2
7
4
5
9
1
5
9
8
4
7
6
9
7
4
3
6
7
5
3
6
8
6
7
very difficult
283
4
9
9
3
2
9
1
3
8
4
1
5
5
8
2
6
5
9
3
7
8
1
2
7
4
6
very difficult
284
4
8
6
5
1
2
4
7
4
3
1
8
2
6
9
8
7
5
6
8
2
9
7
3
very difficult
285
5
9
6
7
8
5
1
5
2
2
8
5
4
3
1
7
1
4
9
6
5
4
3
6
9
very difficult
286
8
3
4
7
4
8
3
9
8
2
7
5
2
1
7
1
6
3
5
1
8
1
6
9
9
8
2
very difficult
287
7
5
3
1
1
4
8
4
6
4
5
6
2
8
3
3
2
8
9
8
9
3
5
6
5
3
4
8
very difficult
288
1
6
5
8
6
4
9
5
4
5
9
4
6
3
1
7
9
9
7
6
3
3
1
3
8
6
9
2
6
5
very difficult
289
1
8
5
5
4
1
7
3
2
9
3
7
5
1
3
5
9
2
3
5
6
2
2
6
5
3
1
9
8
very difficult
290
3
1
9
8
5
7
1
2
2
6
7
7
2
9
6
4
7
2
5
7
8
3
7
1
2
1
8
4
3
very difficult
291
7
1
5
8
6
4
6
5
7
2
9
7
8
2
9
1
6
3
9
5
6
3
6
2
8
4
5
6
very difficult
292
3
6
4
1
7
3
6
8
7
2
3
6
5
2
1
6
5
1
6
9
5
8
3
6
6
9
1
very difficult
293
9
8
7
4
5
2
3
9
1
4
3
9
8
7
1
3
6
9
7
6
9
4
1
1
6
8
7
3
very difficult
294
5
3
1
9
3
4
2
6
9
8
6
2
4
7
7
5
5
4
4
7
2
9
5
8
very difficult
295
6
5
6
7
8
7
4
6
8
4
2
8
9
5
2
3
5
5
1
2
3
5
4
2
1
very difficult
296
6
2
7
1
2
5
3
8
2
5
7
3
4
5
1
6
4
9
9
3
7
4
7
8
4
5
very difficult
297
9
4
8
3
8
3
2
4
5
8
7
3
9
6
9
7
6
7
1
8
2
3
9
4
5
8
1
very difficult
298
6
4
9
2
1
8
6
7
4
6
7
5
4
2
4
9
5
9
4
7
6
5
8
1
2
4
3
9
7
2
very difficult
299
3
4
6
2
5
7
1
8
7
6
4
9
3
7
5
9
4
6
3
8
2
9
2
5
8
5
very difficult
300
1
4
8
1
5
9
6
7
5
6
9
4
1
7
2
5
8
1
4
6
2
5
5
8
4
2
3
8
very difficult

"2025 Christmas Pack, 300 Sudokus for Your Holidays" has 300 sudokus.

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