C1111233131211111211113313331333133313121111133313331333133313331333131223111   >>    C111123313121111121111331333133313331312111113331333133313331333133313122311   <<    C1111233131211111211113313331333133313121111133313331333133313331333131223113   >>      C1111233131211111211113313331333133313121111133313331333133313331333131223112   >>