C2221232323213331311331333133313231333132333112323132332323222212323121   >>    C222123232321333131133133313331323133313233311232313233232322221232312   <<    C2221232323213331311331333133313231333132333112323132332323222212323123   >>      C2221232323213331311331333133313231333132333112323132332323222212323122   >>