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