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 pizza sitting on top of a metal pizza pan'. Replace the letter 'p' with 't' in the sentence.
Example Output: a tizza sitting on tot of a metal tizza tan

Example Input: Sentence: 'a skier leaning inside of a gate on a snowy slope'. Replace the letter 'p' with 'o' in the sentence.
Example Output:
a skier leaning inside of a gate on a snowy slooe