In this task, you need to replace a letter in the sentence with another given letter.

[EX Q]: Sentence: 'two children who are standing next to a white fire hydrant'. Replace the letter 't' with 'r' in the sentence.
[EX A]: rwo children who are sranding nexr ro a whire fire hydranr

[EX Q]: Sentence: 'a zebra is eating hay in a fenced enclosure'. Replace the letter 'e' with 'i' in the sentence.
[EX A]: a zibra is iating hay in a fincid inclosuri

[EX Q]: Sentence: 'a sign that is by the grass in a streets'. Replace the letter 'r' with 'y' in the sentence.
[EX A]:
a sign that is by the gyass in a styeets