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