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

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 man in a baseball cap watching something in the air'. Replace the letter 'g' with 'o' in the sentence.
Example Output: a man in a baseball cap watchino somethino in the air

Example Input: Sentence: 'the guy is trying to play tennis on the court at night'. Replace the letter 'i' with 'h' in the sentence.
Example Output:
the guy hs tryhng to play tennhs on the court at nhght