put six on each side first
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9 N4 x2 E. ?: j/ u$ M" efrom the heavier six, split it to three on each side1 x) \; K' d8 Y- ]& Y* b- Z5 n, E
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then there is three left, put one on each side, if one is heavier then that is it, if they are balanced then last one is heavy one |