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