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