Use Regular Expressions to Add Text to Beginning or End of Cells

I have a bunch of words in a sheet in one column, e.g.:

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What I want to do is add a word to the end of these in the cell using Find & Replace (not a formula), through regular expressions, without using a formula or anything in another cell.
The word to add would be - EBOOK

The same way can we can text to the front of the strings in cells, in this case DD-EB- (just an example).

I'm not sure whether this is entirely possible, but I got the idea from this youtube video:https://www.youtube.com/watch?v=OVzXpLJRcQk