instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a group of people are using their laptops in the dark'. Replace the letter 'p' with 'b' in the sentence.
answer:
a groub of beoble are using their labtobs in the dark


question:
Sentence: 'a couple of white street signs sitting on top of a pole'. Replace the letter 'n' with 't' in the sentence.
answer:
a couple of white street sigts sittitg ot top of a pole


question:
Sentence: 'a little zebra eating grass next to two bigger zebras'. Replace the letter 'l' with 'j' in the sentence.
answer:

a jittje zebra eating grass next to two bigger zebras