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