TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a woman walks by with a large suitcase and a polka dot umbrella'. Replace the letter 'e' with 'n' in the sentence.

SOLUTION: a woman walks by with a largn suitcasn and a polka dot umbrnlla

PROBLEM: Sentence: 'people walk through a local fruit market in a city'. Replace the letter 'e' with 'n' in the sentence.

SOLUTION: pnopln walk through a local fruit marknt in a city

PROBLEM: Sentence: 'a young blond haired boy eating food while standing on a grass covered field'. Replace the letter 's' with 'k' in the sentence.

SOLUTION:
a young blond haired boy eating food while ktanding on a grakk covered field