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: two friends on my facebook list have near-identical names; they are literally only one letter off. both are "diana k..."

one is a fitness instructor at my gym; the other is an enormous person.

"it's diana's birthday!" popped up in my feed, and getting confused and thinking it was the fitness instructor, i wrote: "happy birthday! i'm going to eat pizza, cake, and all other sorts of garbage so i can be just like you today!"

because, you know, fitness instructor.

ha-ha.

a week later, "it's diana's birthday!" popped up in my feed again, and noticing it was the fitness instructor i wrote, "how many birthdays do you have?"

ten minutes later, it dawned on me...

yup.

i felt like the world's biggest asshole.

TIFU: I Accidentally Mocked My Fat Friend