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