TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a double decker bus stopped outside a station on a street'. Replace the letter 'c' with 'y' in the sentence.

SOLUTION: a double deyker bus stopped outside a station on a street

PROBLEM: Sentence: 'a laptop computer attached to a large monitor'. Replace the letter 'a' with 'r' in the sentence.

SOLUTION: r lrptop computer rttrched to r lrrge monitor

PROBLEM: Sentence: 'a kitchen that has a sink and cabinets in it'. Replace the letter 'a' with 'l' in the sentence.

SOLUTION:
l kitchen thlt hls l sink lnd clbinets in it