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

Example Input: Sentence: 'a man standing next to a parking meter'. Replace the letter 'n' with 'p' in the sentence.
Example Output: a map stapdipg pext to a parkipg meter

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 table stand holding a plant and a big blue vase on another stand'. Replace the letter 'r' with 'h' in the sentence.
Example Output:
a table stand holding a plant and a big blue vase on anotheh stand