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Sudoku 18x18 num: 455 (Level: hard)

E
C
A
G
8
9
6
4
G
C
9
H
I
1
5
D
9
H
6
1
2
G
4
4
A
8
H
B
3
I
5
8
A
4
1
5
G
4
A
6
H
7
A
H
5
1
H
9
5
C
5
H
9
3
A
C
B
8
G
4
F
9
D
H
E
I
E
C
A
4
G
9
6
7
G
3
I
D
H
8
6
D
5
2
C
F
4
3
D
H
E
I
C
8
F
4
I
E
1
D
2
8
B
G
5
1
8
4
8
B
9
I
D
1