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

Example Input: Sentence: 'a rare picture of an individual within this image'. Replace the letter 'd' with 'z' in the sentence.
Example Output: a rare picture of an inzivizual within this image

Example Input: Sentence: 'a statue of a person holding their arm up in the air'. Replace the letter 'p' with 'h' in the sentence.
Example Output: a statue of a herson holding their arm uh in the air

Example Input: Sentence: 'a motorcycle is parked in front of a tower viewer overlooking water'. Replace the letter 'e' with 'z' in the sentence.
Example Output:
a motorcyclz is parkzd in front of a towzr vizwzr ovzrlooking watzr