; &quot; &quot; &quot; 

</div>
<div class='input'>
## For extraction purposes the following setup is more useful:
rm_default(x, pattern = &quot;[^A-Za-z&#39; ]&quot;, extract=TRUE)
</div>
<div class='output'>[[1]]
[1] &quot;5&quot; &quot;6&quot; &quot;!&quot;

[[2]]
[1] &quot;-&quot; &quot;2&quot; &quot;9&quot; &quot;0&quot; &quot;.&quot;

[[3]]
[1] NA

[[4]]
[1] NA

[[5]]
[1] &quot;1&quot; &quot;2&quot; &quot;3&quot; &quot;4&quot; &quot;5&quot; &quot;6&quot; &quot;.&quot;

[[6]]
[1] &quot;*&quot; &quot;%&