instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'two police officers riding horses down the street'. Replace the letter 'o' with 'd' in the sentence.
answer:
twd pdlice dfficers riding hdrses ddwn the street

question:
Sentence: 'a rose that is sitting in a vase'. Replace the letter 'r' with 'j' in the sentence.
answer:
a jose that is sitting in a vase

question:
Sentence: 'a gang of bikers riding motorcycles down a city street'. Replace the letter 'g' with 'w' in the sentence.
answer:
a wanw of bikers ridinw motorcycles down a city street