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put six on each side .. take the heaviler side and put three on each side
6 u; F' w2 S* ytake two balls out of the heaviler side and put on each side
: D8 C; Z! B- i+ e# B( kTVBNOW 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。if they r the same the reminder is the heavy ball otherwise u know which one is the heavy ball