C111123313331323113313331333133313331323123231333131133132321123231323132121   >>    C11112331333132311331333133313331333132312323133313113313232112323132313212   <<    C111123313331323113313331333133313331323123231333131133132321123231323132123   >>      C111123313331323113313331333133313331323123231333131133132321123231323132122   >>