Since most solutions have the numbers running together, I wrote up this little one-liner to help split the pairs apart:

perl -ne 'print join " ", sort unpack("A2" x (length()/2), $_)'
[download]

Just pipe the output of your Golf solution into it.

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated