I am searching for files by name criteria: the list of files that have the .h and .cpp extensions

$ find . -name '*.h' -o -name '*.cpp' + +

the list of files that have the .h and .cpp extensions
the result is saved in the file list_of_txt_files.list

$ find . -name '*.h' -o -name '*.cpp' -print > list_of_txt_files.list

I am looking for the list of files whose extension is .chm
And I destroy this list.

$ find . -name "*.chm" -type f -delete

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