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