instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a skier with his legs covered in snow lifts one of his feet to stamp it'. Replace the letter 's' with 'y' in the sentence.
answer:
a ykier with hiy legy covered in ynow lifty one of hiy feet to ytamp it


question:
Sentence: 'a pizza sitting on top of a metal pizza pan'. Replace the letter 'p' with 't' in the sentence.
answer:
a tizza sitting on tot of a metal tizza tan


question:
Sentence: 'an old airplane flies through the sky on a nice day'. Replace the letter 'l' with 'm' in the sentence.
answer:

an omd airpmane fmies through the sky on a nice day