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