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

Example Input: Sentence: 'the child is throwing the frisbee through the hoop'. Replace the letter 't' with 'm' in the sentence.
Example Output: mhe child is mhrowing mhe frisbee mhrough mhe hoop

Example Input: Sentence: 'a group of young people playing a game of soccer'. Replace the letter 'c' with 'o' in the sentence.
Example Output: a group of young people playing a game of soooer

Example Input: Sentence: 'cats on gray compact car near blue house in urban area'. Replace the letter 'e' with 'v' in the sentence.
Example Output:
cats on gray compact car nvar bluv housv in urban arva