TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a back pack and lap top sit on the kitchen counter'. Replace the letter 't' with 'k' in the sentence.

SOLUTION: a back pack and lap kop sik on khe kikchen counker

PROBLEM: Sentence: 'a pair of planes in an airport lot parked for boarding and exiting'. Replace the letter 'e' with 'o' in the sentence.

SOLUTION: a pair of planos in an airport lot parkod for boarding and oxiting

PROBLEM: Sentence: 'a display rack in a bakery store with pies and cakes'. Replace the letter 'n' with 'v' in the sentence.

SOLUTION:
a display rack iv a bakery store with pies avd cakes