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