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