C131121333133313233213331333133313331333133313133313331311222131232322221   >>    C13112133313331323321333133313331333133313331313331333131122213123232222   <<    C131121333133313233213331333133313331333133313133313331311222131232322223   >>      C131121333133313233213331333133313331333133313133313331311222131232322222   >>