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

Input: Consider Input: Sentence: 'a man riding a snowboard on the side of a wall'. Replace the letter 'm' with 'p' in the sentence.

Output: a pan riding a snowboard on the side of a wall

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

Output: people wbtching b kite being flown with b sky bbckground

Input: Consider Input: Sentence: 'a man walking down a road in front of a double decker bus'. Replace the letter 'u' with 'p' in the sentence.
Output: a man walking down a road in front of a dopble decker bps