The final line is sarcastic. It *is* hard. We have too many words in English that sound the same but are supposed to mean different things.
And actually they DO mean the same things, when you take away the context.
”They’re” / ”their” / ”There” all mean: somebody/something/someplace that’s NOT ME, NOT MINE AND NOT HERE.
Easy. Means the same thing. Except grammar nazis, who love to mess around with Context. xD (I am a reformed Grammar Nazi from long ago but I have learned an easier way)