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