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

Example Input: Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.
Example Output: a woman holding a tennis lacket getting leady to hit a tennis ball

Example Input: Sentence: 'a woman sitting on a wooden chair holding a cat'. Replace the letter 'n' with 'q' in the sentence.
Example Output: a womaq sittiqg oq a woodeq chair holdiqg a cat

Example Input: Sentence: 'the view from inside the water looking landward at the beach'. Replace the letter 'a' with 's' in the sentence.
Example Output:
the view from inside the wster looking lsndwsrd st the besch