20
11 16 15 12 14 18 13 17 19 20 
13 14 16 11 17 20 12 19 15 18 
17 13 15 20 18 12 16 14 19 11 
12 15 18 11 13 19 20 17 16 14 
19 17 16 18 20 12 13 15 11 14 
15 16 19 12 13 14 11 20 18 17 
17 15 11 19 13 14 20 16 12 18 
12 14 20 19 13 18 17 16 15 11 
13 15 12 11 14 18 17 19 16 20 
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