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