Sudoku #b26

Sudoku game, level: Beginner #26. This Sudoku have 31 given numbers (clues)..
Structure: 4 (2 pcs.), 5 (2 pcs.), 8 (3 pcs.), 2 (3 pcs.), 7 (4 pcs.), 1 (4 pcs.), 9 (4 pcs.), 3 (4 pcs.), 6 (5 pcs.), ∑31.


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8
1
3
9
4
1
2
7
8
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2
6
9
7
3
9
5
6
7
3
9
5
8
6
3
6
4
2
7
1
6
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