TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a bed with white comforter and two black stiletto heels'. Replace the letter 'h' with 's' in the sentence.

SOLUTION: a bed wits wsite comforter and two black stiletto seels

PROBLEM: Sentence: 'a tennis player throwing a ball at the ground'. Replace the letter 'r' with 'f' in the sentence.

SOLUTION: a tennis playef thfowing a ball at the gfound

PROBLEM: Sentence: 'a bicyclist gazes over the side of a city bridge'. Replace the letter 's' with 'r' in the sentence.

SOLUTION:
a bicyclirt gazer over the ride of a city bridge