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