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

Example Input: Sentence: 'the entree on the long plate is in the middle of the wooden table'. Replace the letter 'h' with 'z' in the sentence.
Example Output: tze entree on tze long plate is in tze middle of tze wooden table

Example Input: Sentence: 'picture of a gothic church with a blue sky in the background'. Replace the letter 'e' with 'i' in the sentence.
Example Output: picturi of a gothic church with a blui sky in thi background

Example Input: Sentence: 'a snowboarder is doing a trick mid air'. Replace the letter 'r' with 'h' in the sentence.
Example Output:
a snowboahdeh is doing a thick mid aih