TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'an elephant in chains converses with a smaller elephant who is not wearing chains'. Replace the letter 'i' with 'm' in the sentence.

SOLUTION: an elephant mn chamns converses wmth a smaller elephant who ms not wearmng chamns

PROBLEM: Sentence: 'a group of women are sitting at a table eating lunch'. Replace the letter 'e' with 'k' in the sentence.

SOLUTION: a group of womkn ark sitting at a tablk kating lunch

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