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