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

Example Input: Sentence: 'three men in a park playing a sport'. Replace the letter 'p' with 'w' in the sentence.
Example Output: three men in a wark wlaying a swort

Example Input: Sentence: 'a batter is batting at a baseball game'. Replace the letter 'b' with 'e' in the sentence.
Example Output: a eatter is eatting at a easeeall game

Example Input: Sentence: 'a black and white picture of an elderly woman sitting at a sewing machine'. Replace the letter 'i' with 'd' in the sentence.
Example Output:
a black and whdte pdcture of an elderly woman sdttdng at a sewdng machdne