20
18 16 11 17 13 20 12 14 19 15 
11 19 12 17 16 18 20 14 15 13 
15 16 17 11 14 12 18 20 19 13 
11 13 20 16 19 14 18 12 17 15 
19 14 12 16 20 17 18 15 11 13 
14 20 11 18 12 15 13 19 17 16 
19 18 17 14 16 15 13 11 20 12 
15 12 20 18 14 11 19 17 13 16 
11 13 20 18 19 15 14 17 16 12 
18 12 17 19 20 11 13 14 16 15 
1 9 3 7 5 4 10 6 8 2 
5 7 10 2 6 1 3 8 4 9 
2 10 7 1 5 9 8 4 6 3 
2 3 8 1 10 9 4 6 7 5 
3 2 6 5 8 1 7 4 9 10 
1 9 10 4 3 8 6 7 2 5 
6 9 10 4 3 8 7 2 1 5 
6 7 10 9 4 3 8 2 5 1 
1 3 6 7 5 8 9 4 2 10 
4 3 6 9 7 10 5 2 1 8 
forbidden 1 11
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forbidden 1 16
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forbidden 3 17
forbidden 3 19
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forbidden 4 15
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forbidden 8 11
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