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