I told you the FIND and REPLACE and the MODE.
Looking at the Replace dialog (Find > Replace), we can then see where each piece of the answer goes:
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What I called FIND and @guy038 called SEARCH goes in the Find what field in the dialog. What I and @guy038 each called REPLACE goes in the Replace with field in the dialog. What I called the MODE is the Search Mode set of radio buttons, and that needs to be set to Regular expression (as shown in my screenshot). Then to do the replacement, you hit the Replace All button. This is shown below:
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Even if you choose to not try to understand the syntax (despite the fact that @guy038 and I both went to lengths to explain every part of the syntax we shared, and I provided you with links where to learn more), I gave you the exact fill-in-the-blanks to do it without any learning on your point, so you can use either of the answers we gave.
To claim that our answers are not helpful because “I am a normal computer user… so I have no idea what you are talking about” is not reasonable. Our answers provided the FIND and REPLACE fields that you needed, without requiring any understanding of the syntax we told you to use, and only requiring you to be able to figure out that FIND or SEARCH maps to Find what and REPLACE maps to Replace with which is not a difficult ask for a “normal computer user”. It is also lying to yourself about your own abilities – you can figure out how to implement the solutions that @guy038 and I described, as can anyone who can follow reasonable directions. If you choose to lie to yourself and tell yourself that you cannot learn the specifics of the syntax, that is your choice (though a bad one): if you choose to believe that lie, then you can just take the solution we gave you and use it, without learning what it means, meaning that you will not be able to replicate similar results for slight changes in your desires in the future, but it will solve your immediate problem.