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 basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.
Example Output: g bgsket holds flowers, twigs, gnd vgrious fruits

Example Input: Sentence: 'a boarded up urbano bus parked near a pile of rocks'. Replace the letter 'e' with 'd' in the sentence.
Example Output:
a boarddd up urbano bus parkdd ndar a pild of rocks