instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'people wait for a train on a snowy sidewalk'. Replace the letter 'n' with 'm' in the sentence.
answer:
people wait for a traim om a smowy sidewalk


question:
Sentence: 'carrots and other vegetables laying on a table'. Replace the letter 'o' with 'd' in the sentence.
answer:
carrdts and dther vegetables laying dn a table


question:
Sentence: 'two birds on a lichen covered rock against a cliff'. Replace the letter 'o' with 'k' in the sentence.
answer:

twk birds kn a lichen ckvered rkck against a cliff