TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'the kitchen has a big screen tv and a lot of counter space'. Replace the letter 'h' with 'z' in the sentence.

SOLUTION: tze kitczen zas a big screen tv and a lot of counter space

PROBLEM: Sentence: 'two people are passing a man playing a piano on the street'. Replace the letter 'o' with 'i' in the sentence.

SOLUTION: twi peiple are passing a man playing a piani in the street

PROBLEM: Sentence: 'a man wearing a jean jacket vest over a gray shirt'. Replace the letter 'r' with 'u' in the sentence.

SOLUTION:
a man weauing a jean jacket vest oveu a guay shiut