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