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Sudoku 18x18 num: 555 (Level: hard)

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