TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a rose that is sitting in a vase'. Replace the letter 'r' with 'j' in the sentence.

SOLUTION: a jose that is sitting in a vase

PROBLEM: Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.

SOLUTION: people wbtching b kite being flown with b sky bbckground

PROBLEM: Sentence: 'a portrait of a teapot and oranges on a saucer'. Replace the letter 'a' with 's' in the sentence.

SOLUTION:
s portrsit of s tespot snd orsnges on s ssucer