instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a black man is smoking a cigarette outside a shop'. Replace the letter 'm' with 'p' in the sentence.
answer:
a black pan is spoking a cigarette outside a shop


question:
Sentence: 'a baseball player holding a baseball bat during a baseball game'. Replace the letter 'a' with 'u' in the sentence.
answer:
u busebull pluyer holding u busebull but during u busebull gume


question:
Sentence: 'two giraffe in tall grass with green trees'. Replace the letter 'g' with 'b' in the sentence.
answer:

two biraffe in tall brass with breen trees