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