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

Example Input: Sentence: 'a baby is holding and eating a banana'. Replace the letter 'i' with 'g' in the sentence.
Example Output: a baby gs holdgng and eatgng a banana

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 group of shoes sitting next to scissors and a bag'. Replace the letter 's' with 'e' in the sentence.
Example Output:
a group of ehoee eitting next to ecieeore and a bag