C111123313331323113313331333133313331323123231333133313231333231311221123121   >>    C11112331333132311331333133313331333132312323133313331323133323131122112312   <<    C111123313331323113313331333133313331323123231333133313231333231311221123123   >>      C111123313331323113313331333133313331323123231333133313231333231311221123122   >>