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