C131121333133313233213331333133313331333133313331333133311213123121   >>    C13112133313331323321333133313331333133313331333133313331121312312   <<    C131121333133313233213331333133313331333133313331333133311213123123   >>      C131121333133313233213331333133313331333133313331333133311213123122   >>