TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.

SOLUTION: a woman holding a tennis lacket getting leady to hit a tennis ball

PROBLEM: Sentence: 'a yellow fire hydrant sitting on the sidewalk'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION: a yelldw fire hydrant sitting dn the sidewalk

PROBLEM: Sentence: 'a yellow fire hydrant on the side of the road'. Replace the letter 'i' with 'g' in the sentence.

SOLUTION:
a yellow fgre hydrant on the sgde of the road