TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: 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.

SOLUTION: a ykier with hiy legy covered in ynow lifty one of hiy feet to ytamp it

PROBLEM: Sentence: 'busy city street with pedestrians and cars with lights all around'. Replace the letter 'r' with 'k' in the sentence.

SOLUTION: busy city stkeet with pedestkians and caks with lights all akound

PROBLEM: Sentence: 'a little asian girl sitting down to eat her breakfast in a spotless restaurant'. Replace the letter 'n' with 'd' in the sentence.

SOLUTION:
a little asiad girl sittidg dowd to eat her breakfast id a spotless restauradt