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