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 plane getting ready to land on a runway'. Replace the letter 'n' with 'o' in the sentence.

SOLUTION: a plaoe gettiog ready to laod oo a ruoway

PROBLEM: Sentence: 'a man wearing glasses and a suit standing in front of a podium with a sign for the center for american progress'. Replace the letter 'f' with 'v' in the sentence.

SOLUTION:
a man wearing glasses and a suit standing in vront ov a podium with a sign vor the center vor american progress