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 ping pong player is in a ready stance to return the ball'. Replace the letter 'n' with 'e' in the sentence.
Example Output: a pieg poeg player is ie a ready staece to reture the ball

Example Input: Sentence: 'a bird up in a tree nibbling on a peach'. Replace the letter 'e' with 'i' in the sentence.
Example Output:
a bird up in a trii nibbling on a piach