instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a couple of giraffe standing next to each other near  a fence'. Replace the letter 'f' with 'j' in the sentence.
answer:
a couple oj girajje standing next to each other near  a jence


question:
Sentence: 'a yellow fire hydrant sitting on the sidewalk'. Replace the letter 'o' with 'd' in the sentence.
answer:
a yelldw fire hydrant sitting dn the sidewalk


question:
Sentence: 'a kitchen with a refrigerator, stove, oven, and microwave'. Replace the letter 'r' with 'c' in the sentence.
answer:

a kitchen with a cefcigecatoc, stove, oven, and miccowave