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put six on each side .. take the heaviler side and put three on each side & P* b' b$ H( a0 s9 ]$ C6 a3 U( a4 i' x
take two balls out of the heaviler side and put on each side
9 x1 m9 Y: J& Z  iif they r the same the reminder is the heavy ball otherwise u know which one is the heavy ball