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

Example Input: Sentence: 'a man on the news, watched on the television'. Replace the letter 'o' with 'z' in the sentence.
Example Output: a man zn the news, watched zn the televisizn

Example Input: Sentence: 'a man holding a baseball bat wearing a baseball uniform'. Replace the letter 'f' with 'h' in the sentence.
Example Output: a man holding a baseball bat wearing a baseball unihorm

Example Input: Sentence: 'a young boy riding his skateboard down the sidewalk'. Replace the letter 'd' with 'p' in the sentence.
Example Output:
a young boy riping his skateboarp pown the sipewalk