How to find single letter words with gedit

Question

I have a very long text with thousands of words and I'm using gedit in order to read it; some of the words are formed by just one letter (for example the letter "d"); when I use the word searcher by typing ctrl+f the search box pops up; when I type the letter that I am looking for I get all the words that contain that letter while I would like to see only those words formed just by the single one. How can I get only the words formed by the single letter I typed?

Answer 1

Let us assume that all the words are separated by space(" "), So instead of searching just the letter e.g. "d", try to search " d " , It should point out the words formed by just one letter.