instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.
answer:
a police officer on a aorse is riding down tae street


question:
Sentence: 'a man riding a snowboard on the side of a wall'. Replace the letter 'm' with 'p' in the sentence.
answer:
a pan riding a snowboard on the side of a wall


question:
Sentence: 'a brown horse is out in a field eating hay'. Replace the letter 'o' with 'i' in the sentence.
answer:

a briwn hirse is iut in a field eating hay