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

Example Input: Sentence: 'the two boys are eating large carrots while sitting on a blanket'. Replace the letter 'a' with 'q' in the sentence.
Example Output: the two boys qre eqting lqrge cqrrots while sitting on q blqnket

Example Input: Sentence: 'a baseball player running to third base from second'. Replace the letter 'a' with 'u' in the sentence.
Example Output: u busebull pluyer running to third buse from second

Example Input: Sentence: 'a young female tennis player jumps to hit the ball as several onlookers watch the game'. Replace the letter 's' with 'w' in the sentence.
Example Output:
a young female tenniw player jumpw to hit the ball aw weveral onlookerw watch the game