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