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