C1111233131211111211113313331333133313232313331333133313223313113313232212331   >>    C111123313121111121111331333133313331323231333133313331322331311331323221233   <<    C1111233131211111211113313331333133313232313331333133313223313113313232212333   >>      C1111233131211111211113313331333133313232313331333133313223313113313232212332   >>