TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a herd of zebra grazing in a lush green field'. Replace the letter 'h' with 'j' in the sentence.

SOLUTION: a jerd of zebra grazing in a lusj green field

PROBLEM: Sentence: 'the airplane is parked on the runway for people to look at'. Replace the letter 'a' with 'e' in the sentence.

SOLUTION: the eirplene is perked on the runwey for people to look et

PROBLEM: Sentence: 'people playing volleyball and two other people sitting in lawn chairs under an umbrella in the backyard'. Replace the letter 'd' with 'g' in the sentence.

SOLUTION:
people playing volleyball ang two other people sitting in lawn chairs unger an umbrella in the backyarg