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

Example Input: Sentence: 'a fire hydrant and a rolled up fire hose'. Replace the letter 'd' with 's' in the sentence.
Example Output: a fire hysrant ans a rolles up fire hose

Example Input: Sentence: 'a person standing on some skis going through the snow'. Replace the letter 'o' with 'l' in the sentence.
Example Output: a persln standing ln slme skis gling thrlugh the snlw

Example Input: Sentence: 'a man skateboards down a street with the help of a pole'. Replace the letter 'o' with 'c' in the sentence.
Example Output:
a man skatebcards dcwn a street with the help cf a pcle