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