Adding a character before and after each text in MS Word

I have a long paragraph in Microsoft office(Word). The thing I want to do is, I want to add a fixed character (say “i”) before and after each words in my doument. For example if there is a word in my paragraph, say “superuser” then it should become “isuperuseri”, and this should happen to every other words in the paragraph. Though I know a character can be added after each word using find and replace method, but how about this one? Well, I’m using MS office’s latest version.