TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man sitting in a chair with a laptop in his lap'. Replace the letter 'p' with 'v' in the sentence.

SOLUTION: a man sitting in a chair with a lavtov in his lav

PROBLEM: Sentence: 'a gray elephant standing next to green bushes'. Replace the letter 'e' with 'o' in the sentence.

SOLUTION: a gray olophant standing noxt to groon bushos

PROBLEM: Sentence: 'a professional tennis player leaping for the ball'. Replace the letter 'e' with 'g' in the sentence.

SOLUTION:
a profgssional tgnnis playgr lgaping for thg ball