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: 'an overhead view of a city cross walk on a rainy day features an array of colorful umbrellas'. Replace the letter 's' with 'd' in the sentence.

SOLUTION: an overhead view of a city crodd walk on a rainy day featured an array of colorful umbrellad

PROBLEM: Sentence: 'the man is riding the galloping horse down the beach'. Replace the letter 'd' with 's' in the sentence.

SOLUTION:
the man is rising the galloping horse sown the beach