TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.

SOLUTION: a close shot of a stop sign near a uuilding

PROBLEM: Sentence: 'a motorcycle sitting on the side of the road by grass'. Replace the letter 'r' with 't' in the sentence.

SOLUTION: a mototcycle sitting on the side of the toad by gtass

PROBLEM: Sentence: 'young man skateboarding at a skate park by the sea'. Replace the letter 'g' with 'o' in the sentence.

SOLUTION:
youno man skateboardino at a skate park by the sea