# [Perl 5], <s>24</s> 22 bytes

Includes `+2` for `-la`

<!-- language-all: lang-perl -->

    #!/usr/bin/perl -la
    $_<"$o $_"||say$o=$_

[Try it online!][TIO-jf2pdd0o]

[Perl 5]: https://www.perl.org/
[TIO-jf2pdd0o]: https://tio.run/##K0gtyjH9/18l3kZJJV9BJV6ppqY4sVIl31Yl/v9/XUMuIwUuUwUuEwUuYwUucyD6l19QkpmfV/xfNyfxv66vqZ6hgZ4BAA "Perl 5 – Try It Online"