C1111233131211111211113313331333133313232313331333133313331312111133221311   >>    C111123313121111121111331333133313331323231333133313331333131211113322131   <<    C1111233131211111211113313331333133313232313331333133313331312111133221313   >>      C1111233131211111211113313331333133313232313331333133313331312111133221312   >>