TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a clean, sterile bathroom with a shower, toilet, and sink'. Replace the letter 'n' with 'k' in the sentence.

SOLUTION: a cleak, sterile bathroom with a shower, toilet, akd sikk

PROBLEM: Sentence: 'two police officers riding horses down the street'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION: twd pdlice dfficers riding hdrses ddwn the street

PROBLEM: Sentence: 'three black cats laying or sitting on the floor'. Replace the letter 't' with 'k' in the sentence.

SOLUTION:
khree black caks laying or sikking on khe floor