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