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

Sentence: 'a bunch of red apples next to a few oranges'. Replace the letter 'n' with 'x' in the sentence.
a buxch of red apples xext to a few oraxges

Sentence: 'a cat sits on the floor next to a purse'. Replace the letter 'a' with 'b' in the sentence.
b cbt sits on the floor next to b purse

Sentence: 'a woman stands in front of an elephant'. Replace the letter 'w' with 'd' in the sentence.

a doman stands in front of an elephant