C312312111112111113121333133313331333133313331333211232313233313223313233122311   >>    C31231211111211111312133313331333133313331333133321123231323331322331323312231   <<    C312312111112111113121333133313331333133313331333211232313233313223313233122313   >>      C312312111112111113121333133313331333133313331333211232313233313223313233122312   >>