C1111233131211111211113313331333133313232313331333133313331311222113231   >>    C111123313121111121111331333133313331323231333133313331333131122211323   <<    C1111233131211111211113313331333133313232313331333133313331311222113233   >>      C1111233131211111211113313331333133313232313331333133313331311222113232   >>