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

Example Input: Sentence: 'bags of apples on display at the market'. Replace the letter 'y' with 'p' in the sentence.
Example Output: bags of apples on displap at the market

Example Input: Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.
Example Output: people wbtching b kite being flown with b sky bbckground

Example Input: Sentence: 'a selfie shot in the mirrored door in a room'. Replace the letter 't' with 'e' in the sentence.
Example Output:
a selfie shoe in ehe mirrored door in a room