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

Example Input: Sentence: 'a baseball player swinging a bat at a ball'. Replace the letter 's' with 'n' in the sentence.
Example Output: a baneball player nwinging a bat at a ball

Example Input: Sentence: 'an image of a small galley-style kitchen pointed towards a skinny door'. Replace the letter 's' with 'i' in the sentence.
Example Output: an image of a imall galley-ityle kitchen pointed towardi a ikinny door

Example Input: Sentence: 'a plate with carrots, grilled meat, and broccoli'. Replace the letter 'a' with 't' in the sentence.
Example Output:
t pltte with ctrrots, grilled mett, tnd broccoli