C13131221323331323131323132323213231323131323223313233313112211221   >>    C1313122132333132313132313232321323132313132322331323331311221122   <<    C13131221323331323131323132323213231323131323223313233313112211223   >>      C13131221323331323131323132323213231323131323223313233313112211222   >>