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

Example Input: Sentence: 'a table that has a pizza sitting on it'. Replace the letter 'a' with 'w' in the sentence.
Example Output: w twble thwt hws w pizzw sitting on it

Example Input: Sentence: 'a black man is smoking a cigarette outside a shop'. Replace the letter 'm' with 'p' in the sentence.
Example Output: a black pan is spoking a cigarette outside a shop

Example Input: Sentence: 'a blue and yellow "book bus" is parked on the street'. Replace the letter 'r' with 'u' in the sentence.
Example Output:
a blue and yellow "book bus" is pauked on the stueet