in reply to Removing white space from the file
You can do it in command line itself,
perl -p -i -e "s/[0-9\s]//g" uuu.txt
Options:
-p processes, then prints <> line by line
-i activates in-place editing.
The regex substitution acts on the implicit variable, which are the contents of the file, line-by-line
Read more on perlrun for each options.
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