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