TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'red helicopter with landing wheels flying in the sky'. Replace the letter 'h' with 'y' in the sentence.

SOLUTION: red yelicopter wity landing wyeels flying in tye sky

PROBLEM: Sentence: 'a family opens gifts in a room with their dog, while sitting on couches'. Replace the letter 's' with 'l' in the sentence.

SOLUTION: a family openl giftl in a room with their dog, while litting on couchel

PROBLEM: Sentence: 'man swinging a tennis racket on a green and blue court'. Replace the letter 't' with 'w' in the sentence.

SOLUTION:
man swinging a wennis rackew on a green and blue courw