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