In this task, you need to replace a letter in the sentence with another given letter.

[Q]: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
[A]: a close shot of a stop sign near a uuilding

[Q]: Sentence: 'a man stands next to a basketball as it sits on the floor'. Replace the letter 'n' with 'o' in the sentence.
[A]: a mao staods oext to a basketball as it sits oo the floor

[Q]: Sentence: 'multiple country flags lined up in front of big ben'. Replace the letter 't' with 'r' in the sentence.
[A]:
mulriple counrry flags lined up in fronr of big ben