TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'someone playing frisbee with a dog in the middle of a court'. Replace the letter 'd' with 'r' in the sentence.

SOLUTION: someone playing frisbee with a rog in the mirrle of a court

PROBLEM: Sentence: 'a hand held game or older cell phone'. Replace the letter 'o' with 'c' in the sentence.

SOLUTION: a hand held game cr clder cell phcne

PROBLEM: Sentence: 'a metal tube covered in blue paint on the side of a road'. Replace the letter 'd' with 'z' in the sentence.

SOLUTION:
a metal tube coverez in blue paint on the size of a roaz