C111123313331323113313331333133313331323131211113313331311331323222232131232311   >>    C11112331333132311331333133313331333132313121111331333131133132322223213123231   <<    C111123313331323113313331333133313331323131211113313331311331323222232131232313   >>      C111123313331323113313331333133313331323131211113313331311331323222232131232312   >>