C111123313331323113313331333133313331323123231333133313232313233212231   >>    C11112331333132311331333133313331333132312323133313331323231323321223   <<    C111123313331323113313331333133313331323123231333133313232313233212233   >>      C111123313331323113313331333133313331323123231333133313232313233212232   >>