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

Example Input: Sentence: 'a person on a snowboard does an air trick'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a persoo oo a soowboard does ao air trick

Example Input: Sentence: 'a pile of chopped up broccoli sits next to bottles of sauces'. Replace the letter 't' with 'y' in the sentence.
Example Output: a pile of chopped up broccoli siys nexy yo boyyles of sauces

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