C1111233131211111211113313331333133313232321331121111133313222313113231   >>    C111123313121111121111331333133313331323232133112111113331322231311323   <<    C1111233131211111211113313331333133313232321331121111133313222313113233   >>      C1111233131211111211113313331333133313232321331121111133313222313113232   >>