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