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