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

Example Input: Sentence: 'a white stove top oven sitting in a kitchen'. Replace the letter 'k' with 'b' in the sentence.
Example Output: a white stove top oven sitting in a bitchen

Example Input: Sentence: 'children trying little hamburgers from a tray at school'. Replace the letter 'y' with 'l' in the sentence.
Example Output: children trling little hamburgers from a tral at school

Example Input: Sentence: 'a man standing on a baggage cart in a runway helping with luggage on a plane'. Replace the letter 'n' with 'q' in the sentence.
Example Output:
a maq staqdiqg oq a baggage cart iq a ruqway helpiqg with luggage oq a plaqe