Regular expressions - Insert line break before a character.


I have a writer document which contains some paragraphs and I made them to end with a) or b) or c) etc.

Is there a way to insert a line break before a specific character by using regular expressions in find and replace tool? I want to insert a line break three characters before the end of every paragraph, so that a) moves to the start of a new line.

By using regular expressions I can find the text at the end of every paragraph (for expample a) by typing [ ][:alpha:][)]$ in the search for box), but I don’t know how to insert line brake (\n) before the appropriate character.