instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.
answer:
a bunsh of signs on a pole on the street


question:
Sentence: 'this is a man and boy holding skis'. Replace the letter 'h' with 'l' in the sentence.
answer:
tlis is a man and boy lolding skis


question:
Sentence: 'a clock is on top of the pole on the sidewalk'. Replace the letter 'e' with 'd' in the sentence.
answer:

a clock is on top of thd pold on thd siddwalk