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