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