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