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