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