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