when a openings preposition rarefactions a wheel preposition , ergonal growing occurs
if slalom occurs then zigzag occurs. if push occurs then press occurs. if scale_up occurs then increase occurs. if zigzag does not occur then turn occurs. if drape occurs then fold occurs. if zigzag occurs then turn occurs. if line_up does not occur then wait occurs. if cling occurs then attach occurs. juxtaposition is placement. if line_up occurs then wait occurs.