TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a person flying a kite on the beach  between some trees'. Replace the letter 's' with 'k' in the sentence.

SOLUTION: a perkon flying a kite on the beach  between kome treek

PROBLEM: Sentence: 'a woman gives a thumbs up sign while sitting in front of a sandwich'. Replace the letter 's' with 'h' in the sentence.

SOLUTION: a woman giveh a thumbh up hign while hitting in front of a handwich

PROBLEM: Sentence: 'a flower arrangement with three red roses in a glass vase'. Replace the letter 'r' with 'm' in the sentence.

SOLUTION:
a flowem ammangement with thmee med moses in a glass vase