C131121333133313233213331333133313331333133313331333133313123223213112231   >>    C13112133313331323321333133313331333133313331333133313331312322321311223   <<    C131121333133313233213331333133313331333133313331333133313123223213112233   >>      C131121333133313233213331333133313331333133313331333133313123223213112232   >>