C1111233131211111211113313331333133313232321333133313331333133112111113232311   >>    C111123313121111121111331333133313331323232133313331333133313311211111323231   <<    C1111233131211111211113313331333133313232321333133313331333133112111113232313   >>      C1111233131211111211113313331333133313232321333133313331333133112111113232312   >>