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

Example Input: Sentence: 'a man swinging at a tennis with a racquet on a court'. Replace the letter 't' with 'c' in the sentence.
Example Output: a man swinging ac a cennis wich a racquec on a courc

Example Input: Sentence: 'a little girl laying on a boogie board next to the ocean'. Replace the letter 't' with 'm' in the sentence.
Example Output: a limmle girl laying on a boogie board nexm mo mhe ocean

Example Input: Sentence: 'a young boy giving a thumbs up about a pizza ssitting next to him'. Replace the letter 'b' with 'g' in the sentence.
Example Output:
a young goy giving a thumgs up agout a pizza ssitting next to him