please answer this in python as simple as possible :-) thanks!

1.5. Write a function txtHelp(txt) that returns an expanded version of the string txt, which may contain texting abbreviations like "brb" and "lol." Your function should expand at least four different texting abbreviations. For example, txtHelp ('imo u r lol brb') might return the string 'in my opinion you are laugh out loud be right back