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

Example Input: Sentence: 'the kitchen counter has a pitcher of lime juice'. Replace the letter 'h' with 'p' in the sentence.
Example Output: tpe kitcpen counter pas a pitcper of lime juice

Example Input: Sentence: 'a u.s. military helicopter landing or taking off'. Replace the letter 'i' with 'l' in the sentence.
Example Output: a u.s. mllltary hellcopter landlng or taklng off

Example Input: Sentence: 'several people riding motorcycles in a city setting'. Replace the letter 'd' with 'm' in the sentence.
Example Output:
several people riming motorcycles in a city setting