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 close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
Example Output: a close shot of a stop sign near a uuilding

Example Input: Sentence: 'black and white image of people standing in front of a painted advertisement'. Replace the letter 'g' with 'h' in the sentence.
Example Output:
black and white imahe of people standinh in front of a painted advertisement