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

Example Input: Sentence: 'a couple of kids with rackets on a court'. Replace the letter 'u' with 'd' in the sentence.
Example Output: a codple of kids with rackets on a codrt

Example Input: Sentence: 'a group of men and women sitting next to each other'. Replace the letter 'p' with 'l' in the sentence.
Example Output: a groul of men and women sitting next to each other

Example Input: Sentence: 'some people play with a wii in their living room'. Replace the letter 'l' with 'i' in the sentence.
Example Output:
some peopie piay with a wii in their iiving room