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