C111123313331323113313331333133313331323132333133313311232313111   >>    C11112331333132311331333133313331333132313233313331331123231311   <<    C111123313331323113313331333133313331323132333133313311232313113   >>      C111123313331323113313331333133313331323132333133313311232313112   >>