That was fun.<p>Hint: The file &quot;vehicles&quot; will be easier to deal with using the standard POSIX tools if you translate it into a line-oriented format. Here is a way to do it (in rot13):<p><pre><code>    &lt;iruvpyrf ge &#x27;\a&#x27; &#x27;|&#x27; | frq -r &#x27;f&#x2F;Yvprafr&#x2F;\aYvprafr&#x2F;t&#x27; &gt; iruvpyrf.ersbeznggrq
</code></pre>
An alternative solution is to notice that &quot;vehicles&quot; is <i>almost</i> a valid Recutils [1] file. The fix is as simple as<p><pre><code>    frq -r &#x27;1,4q;f&#x2F;Yvprafr Cyngr&#x2F;YvprafrCyngr:&#x2F;&#x27; iruvpyrf &gt; iruvpyrf.erp
</code></pre>
You can query the result with `recsel`. (Admittedly, I didn&#x27;t try this until after solving the mystery.)<p>[1] <a href="https:&#x2F;&#x2F;www.gnu.org&#x2F;software&#x2F;recutils&#x2F;#content" rel="nofollow">https:&#x2F;&#x2F;www.gnu.org&#x2F;software&#x2F;recutils&#x2F;#content</a>