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

Example Input: Sentence: 'a dirt bike rider that is riding in the mud'. Replace the letter 'a' with 'o' in the sentence.
Example Output: o dirt bike rider thot is riding in the mud

Example Input: Sentence: 'a toilet and a microwave sitting out for the trash'. Replace the letter 'i' with 's' in the sentence.
Example Output: a toslet and a mscrowave ssttsng out for the trash

Example Input: Sentence: 'tall tower with a clock on top on an overcast day'. Replace the letter 'n' with 'v' in the sentence.
Example Output:
tall tower with a clock ov top ov av overcast day