instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'an overhead view of a city cross walk on a rainy day features an array of colorful umbrellas'. Replace the letter 's' with 'd' in the sentence.
answer:
an overhead view of a city crodd walk on a rainy day featured an array of colorful umbrellad


question:
Sentence: 'a dog laying in front of a horses stall with the horse peeking over the half door'. Replace the letter 'a' with 'b' in the sentence.
answer:
b dog lbying in front of b horses stbll with the horse peeking over the hblf door


question:
Sentence: 'a plane parked on a tarmac of a airport'. Replace the letter 'i' with 'u' in the sentence.
answer:

a plane parked on a tarmac of a aurport