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