C111123313331323113313331333133313331323123231333133313112123313121   >>    C11112331333132311331333133313331333132312323133313331311212331312   <<    C111123313331323113313331333133313331323123231333133313112123313123   >>      C111123313331323113313331333133313331323123231333133313112123313122   >>