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