pan><span class="op">(</span><span class="fu"><a href="https://rdrr.io/pkg/stringr/man/case.html">str_to_lower</a></span><span class="op">(</span><span class="va">x</span><span class="op">)</span>, <span class="st">"oso"</span><span class="op">)</span> </code></pre></div>
<pre><code>## [1]  TRUE  TRUE FALSE FALSE  TRUE FALSE</code></pre>
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