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