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

Example Input: Sentence: 'someone playing frisbee with a dog in the middle of a court'. Replace the letter 'd' with 'r' in the sentence.
Example Output: someone playing frisbee with a rog in the mirrle of a court

Example Input: Sentence: 'three men playing in a men's doubles tennis match'. Replace the letter 'e' with 'l' in the sentence.
Example Output: thrll mln playing in a mln's doublls tlnnis match

Example Input: Sentence: 'a bathroom with a white toilet next to a white bath tub'. Replace the letter 't' with 'j' in the sentence.
Example Output:
a bajhroom wijh a whije joilej nexj jo a whije bajh jub