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