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

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: 'the person rides down the path atop the pink skateboard'. Replace the letter 'e' with 'c' in the sentence.
Example Output: thc pcrson ridcs down thc path atop thc pink skatcboard

Example Input: Sentence: 'assorted poles covered with assorted colorful signs'. Replace the letter 't' with 'h' in the sentence.
Example Output:
assorhed poles covered wihh assorhed colorful signs