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