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