TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man that is throwing a frizbee in the woods'. Replace the letter 'g' with 'u' in the sentence.

SOLUTION: a man that is throwinu a frizbee in the woods

PROBLEM: Sentence: 'a person is standing in the snow in skis'. Replace the letter 'g' with 'x' in the sentence.

SOLUTION: a person is standinx in the snow in skis

PROBLEM: Sentence: 'a man holds a surfboard as he walks up the stairs'. Replace the letter 'l' with 'v' in the sentence.

SOLUTION:
a man hovds a surfboard as he wavks up the stairs