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

Example Input: Sentence: 'a woman sitting in front of a laptop computer'. Replace the letter 'u' with 'o' in the sentence.
Example Output: a woman sitting in front of a laptop compoter

Example Input: Sentence: 'a man that is on the back of an elephant'. Replace the letter 'c' with 'd' in the sentence.
Example Output: a man that is on the badk of an elephant

Example Input: Sentence: 'men and woman dine at a company cafeteria'. Replace the letter 'p' with 'o' in the sentence.
Example Output:
men and woman dine at a comoany cafeteria