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