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