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