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

Example Input: Sentence: 'a baseball player swings his bat at a pitch'. Replace the letter 's' with 'l' in the sentence.
Example Output: a baleball player lwingl hil bat at a pitch

Example Input: Sentence: 'a man with scruffy hair wearing a tie and glasses'. Replace the letter 'r' with 'f' in the sentence.
Example Output: a man with scfuffy haif weafing a tie and glasses

Example Input: Sentence: 'a patio table with chairs and a large umbrella in the middle'. Replace the letter 'n' with 'e' in the sentence.
Example Output:
a patio table with chairs aed a large umbrella ie the middle