C1311213331333132332133313331333133313331333131333133313112113112121   >>    C131121333133313233213331333133313331333133313133313331311211311212   <<    C1311213331333132332133313331333133313331333131333133313112113112123   >>      C1311213331333132332133313331333133313331333131333133313112113112122   >>