C1111233131211111211113313331333133313331333133313331333133313113311323321   >>    C111123313121111121111331333133313331333133313331333133313331311331132332   <<    C1111233131211111211113313331333133313331333133313331333133313113311323323   >>      C1111233131211111211113313331333133313331333133313331333133313113311323322   >>