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: 'a man is somewhat hard to be seen in the wave, on his board'. Replace the letter 's' with 'b' in the sentence.
answer:
a man ib bomewhat hard to be been in the wave, on hib board


question:
Sentence: 'a tub with a rubber duck sits in front of a television'. Replace the letter 'i' with 'y' in the sentence.
answer:

a tub wyth a rubber duck syts yn front of a televysyon