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

Example Input: Sentence: 'a man is at bat at a baseball game with a crowd watching'. Replace the letter 't' with 'f' in the sentence.
Example Output: a man is af baf af a baseball game wifh a crowd wafching

Example Input: Sentence: 'a dog drinking out of a bowl of water'. Replace the letter 'w' with 'k' in the sentence.
Example Output: a dog drinking out of a bokl of kater

Example Input: Sentence: 'a multi level kite stretches high in to a blue sky'. Replace the letter 'l' with 'r' in the sentence.
Example Output:
a murti rever kite stretches high in to a brue sky