TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'people are standing outside in the parking lot'. Replace the letter 'i' with 'z' in the sentence.

SOLUTION: people are standzng outszde zn the parkzng lot

PROBLEM: Sentence: 'a kid is sitting on a skateboard outside'. Replace the letter 'd' with 'a' in the sentence.

SOLUTION: a kia is sitting on a skateboara outsiae

PROBLEM: Sentence: 'a man sitting on top of a black box on a sidewalk'. Replace the letter 'b' with 'c' in the sentence.

SOLUTION:
a man sitting on top of a clack cox on a sidewalk