C1111233131211111211113313331333133313232313331333131133132322211221   >>    C111123313121111121111331333133313331323231333133313113313232221122   <<    C1111233131211111211113313331333133313232313331333131133132322211223   >>      C1111233131211111211113313331333133313232313331333131133132322211222   >>