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