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

Example Input: Sentence: 'two tennis players shaking hands over the net'. Replace the letter 'n' with 'f' in the sentence.
Example Output: two teffis players shakifg hafds over the fet

Example Input: Sentence: 'a large elephant that has people all around it'. Replace the letter 'h' with 'm' in the sentence.
Example Output: a large elepmant tmat mas people all around it

Example Input: Sentence: 'a plate topped with waffles, bacon and banana slices'. Replace the letter 'a' with 'k' in the sentence.
Example Output:
k plkte topped with wkffles, bkcon knd bknknk slices