C1111233131211111211113313331333133313232313331333131133131133132332221   >>    C111123313121111121111331333133313331323231333133313113313113313233222   <<    C1111233131211111211113313331333133313232313331333131133131133132332223   >>      C1111233131211111211113313331333133313232313331333131133131133132332222   >>