instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a large clock on the top of pole in the middle of a walk way'. Replace the letter 'f' with 'h' in the sentence.
answer:
a large clock on the top oh pole in the middle oh a walk way

question:
Sentence: 'a box of a dozen doughnuts all varieties'. Replace the letter 'l' with 'i' in the sentence.
answer:
a box of a dozen doughnuts aii varieties

question:
Sentence: 'two parking meters in front of a black and yellow background'. Replace the letter 'l' with 'y' in the sentence.
answer:
two parking meters in front of a byack and yeyyow background