g >at at at at at at &g > at &g &g &g &g &g &g &g > &g &g &g &g &g &g &g &g &g &g &g &g &g &g &g &g &g > > &g &g &g &g &g &h &h &h > &h &h &g > > > &g &h > &h &h & 。