C111123313331323113313331333133313121111133112111133132213232311   >>    C11112331333132311331333133313331312111113311211113313221323231   <<    C111123313331323113313331333133313121111133112111133132213232313   >>      C111123313331323113313331333133313121111133112111133132213232312   >>