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

Example Input: Sentence: 'a child watching television changing the station with a remote'. Replace the letter 'n' with 'z' in the sentence.
Example Output: a child watchizg televisioz chazgizg the statioz with a remote

Example Input: Sentence: 'a small plastic dish with food in it'. Replace the letter 'p' with 'g' in the sentence.
Example Output: a small glastic dish with food in it

Example Input: Sentence: 'a man is standing with this luggage next to a railroad track'. Replace the letter 'g' with 'l' in the sentence.
Example Output:
a man is standinl with this lullale next to a railroad track