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