instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'people walk through a local fruit market in a city'. Replace the letter 'e' with 'n' in the sentence.
answer:
pnopln walk through a local fruit marknt in a city


question:
Sentence: 'traffic congestion with cars and an electric tram'. Replace the letter 'a' with 'k' in the sentence.
answer:
trkffic congestion with ckrs knd kn electric trkm


question:
Sentence: 'an older man is holding luggage outside a transport center'. Replace the letter 's' with 'v' in the sentence.
answer:

an older man iv holding luggage outvide a tranvport center