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