TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a bunch of red apples next to a few oranges'. Replace the letter 'n' with 'x' in the sentence.

SOLUTION: a buxch of red apples xext to a few oraxges

PROBLEM: Sentence: 'a man is at bat at a baseball game with a crowd watching'. Replace the letter 't' with 'f' in the sentence.

SOLUTION: a man is af baf af a baseball game wifh a crowd wafching

PROBLEM: Sentence: 'a cow and her heifer grazing in a dry grassy area'. Replace the letter 'w' with 'o' in the sentence.

SOLUTION:
a coo and her heifer grazing in a dry grassy area