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

Example Input: Sentence: 'a cat is watching a computer with a video of a cat'. Replace the letter 't' with 'a' in the sentence.
Example Output: a caa is waaching a compuaer wiah a video of a caa

Example Input: Sentence: 'plated foods displayed on table with condiments and side dishes'. Replace the letter 's' with 'd' in the sentence.
Example Output: plated foodd didplayed on table with condimentd and dide didhed

Example Input: Sentence: 'both pictures show the same tennis player about to hit the ball'. Replace the letter 'b' with 's' in the sentence.
Example Output:
soth pictures show the same tennis player asout to hit the sall