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