C1111233131211111211113313331333133313232313331333133311233113231   >>    C111123313121111121111331333133313331323231333133313331123311323   <<    C1111233131211111211113313331333133313232313331333133311233113233   >>      C1111233131211111211113313331333133313232313331333133311233113232   >>