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: so today i fucked up i apologize about the shit formatting i'm
on mobile 

so today i was with my friend we will call her m and she was babysitting her 4 year old sister we will call her j. so i was with m and me and her were smoking hookah and her little sister j walks in and says "what are you guys doing?" and we both respond with "grown up stuff" which she responds to "i'm a grown up i wanna try!" we both look at each other and both agree that it's just hookah what damage could be done? right? wrong! she starts demanding more and more which we give her like 3 hits and it's done she leaves. no harm done. well i'm on my way home after a few more hours and it hits me kinda hard "i just let a fucking 4 year old smoke hookah!!" i called my friend to check up on her and j is feeling fine...but man do i feel like shit so reddit today i fucked up.

TIFU and opened my gateway to hell...