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