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

Example Input: Sentence: 'some tracks for a rail way system near a building'. Replace the letter 'a' with 'h' in the sentence.
Example Output: some trhcks for h rhil why system nehr h building

Example Input: Sentence: 'a brown door that says gentlemen and a toilet'. Replace the letter 'o' with 'f' in the sentence.
Example Output: a brfwn dffr that says gentlemen and a tfilet

Example Input: Sentence: 'a table topped with meats, veggies and gravy'. Replace the letter 'g' with 'l' in the sentence.
Example Output:
a table topped with meats, vellies and lravy