Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: i had two bills in my wallet. a $1 and a $20. i didn't look and when she made a comment about change i just said, "it's okay." i went to the store and pulled out my wallet and saw the $1 and realized what i did.

TIFU: I thought I handed the sonic lady $1.20 for a 1.16 coke and said I didn't need change. I handed her $20.20. I gave her the wrong bill.