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

Example Input: Sentence: 'a pizza sitting on top of a metal pizza pan'. Replace the letter 'p' with 't' in the sentence.
Example Output: a tizza sitting on tot of a metal tizza tan

Example Input: Sentence: 'a woman in blue jacket shaving a cows utters'. Replace the letter 'h' with 'q' in the sentence.
Example Output: a woman in blue jacket sqaving a cows utters

Example Input: Sentence: 'a woman about to stand on her surfboard in the ocean'. Replace the letter 'i' with 'n' in the sentence.
Example Output:
a woman about to stand on her surfboard nn the ocean