instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a yellow fire truck parked in a parking lot'. Replace the letter 'a' with 'y' in the sentence.
answer:
y yellow fire truck pyrked in y pyrking lot


question:
Sentence: 'a few zebras that are next to each other'. Replace the letter 'o' with 'u' in the sentence.
answer:
a few zebras that are next tu each uther


question:
Sentence: 'men paying for their order at doughnut shop'. Replace the letter 'p' with 'f' in the sentence.
answer:

men faying for their order at doughnut shof