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my $dom = 'XML::LibXML'->load_xml(IO => *STDIN);

my ($other_title) = $dom->findnodes('//file/body/group/unit/alt-title/
+otherTitle[@origin="tilte"]');

a
b
c

<root>
  <one>
...
    <two origin="b">old</two>
  </one>
</root>

#!/usr/bin/perl
use warnings;
...
    $two->appendText($_);
}
print $dom;

perl script.pl 1 < 1.xml

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,