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