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(24/30)*(23/29)*(22/28)*(21/27)*(20/26)*(19/25)*(21/27)*(20/26)*(19/25)*(18/24)
(24/30)*(23/29)*(22/28)*(21/27)*(20/26)*(19/25)*(21/27)*(20/26)*(19/25)*(18/24)
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