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