instruction:
In this task, you need to replace a letter in the sentence with another given letter.
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 large orange cat sits in a chair outside'. Replace the letter 'e' with 'x' in the sentence.
answer:
a largx orangx cat sits in a chair outsidx


question:
Sentence: 'man in black shorts standing on top of an elephant in the water'. Replace the letter 'e' with 't' in the sentence.
answer:

man in black shorts standing on top of an tltphant in tht wattr