instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a mobile phone and a set of keys on a key chain'. Replace the letter 's' with 'j' in the sentence.
answer:
a mobile phone and a jet of keyj on a key chain


question:
Sentence: 'a man on a horse in riding gear looking onward'. Replace the letter 'o' with 'h' in the sentence.
answer:
a man hn a hhrse in riding gear lhhking hnward


question:
Sentence: 'a couple of people on skis standing in the snow'. Replace the letter 'l' with 'g' in the sentence.
answer:

a coupge of peopge on skis standing in the snow