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put six on each side .. take the heaviler side and put three on each side TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。% M4 J1 c) U: i" h4 A
take two balls out of the heaviler side and put on each side 5 t; i7 k# b0 ?0 v: h7 O
if they r the same the reminder is the heavy ball otherwise u know which one is the heavy ball