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

Example Input: Sentence: 'a large white sign with black lettering  leaning against a metal fence'. Replace the letter 'e' with 'j' in the sentence.
Example Output: a largj whitj sign with black ljttjring  ljaning against a mjtal fjncj

Example Input: Sentence: 'a formal dinning room in a stately manor'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a formal diooiog room io a stately maoor

Example Input: Sentence: 'a zebra peeping through the window of a car'. Replace the letter 'b' with 'n' in the sentence.
Example Output:
a zenra peeping through the window of a car