TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a giraffe leaning over a fence from inside it's pasture'. Replace the letter 'n' with 'l' in the sentence.

SOLUTION: a giraffe lealilg over a felce from ilside it's pasture

PROBLEM: Sentence: 'a baseball player holding a bat in front of catcher and umpire'. Replace the letter 'i' with 'k' in the sentence.

SOLUTION: a baseball player holdkng a bat kn front of catcher and umpkre

PROBLEM: Sentence: 'a  large tour bus parked near a street curb'. Replace the letter 's' with 'p' in the sentence.

SOLUTION:
a  large tour bup parked near a ptreet curb