C1111233131211111211113313331333133313232313331333131133122332311   >>    C111123313121111121111331333133313331323231333133313113312233231   <<    C1111233131211111211113313331333133313232313331333131133122332313   >>      C1111233131211111211113313331333133313232313331333131133122332312   >>