instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'many people gathered on a sunny day flying kites'. Replace the letter 'e' with 'm' in the sentence.
answer:
many pmoplm gathmrmd on a sunny day flying kitms


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 dog laying near smaller dogs and a cat'. Replace the letter 'n' with 'k' in the sentence.
answer:

a dog layikg kear smaller dogs akd a cat