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

Example Input: Sentence: 'a toilet that is being worked on with its seat removed'. Replace the letter 't' with 'p' in the sentence.
Example Output: a poilep phap is being worked on wiph ips seap removed

Example Input: Sentence: 'a group of men sitting at a desk with lap top computers'. Replace the letter 'p' with 'z' in the sentence.
Example Output: a grouz of men sitting at a desk with laz toz comzuters

Example Input: Sentence: 'a cat is sitting next to a camera in a case'. Replace the letter 'e' with 'z' in the sentence.
Example Output:
a cat is sitting nzxt to a camzra in a casz