TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man in a field standing as a ball comes through the air towards him'. Replace the letter 'u' with 'j' in the sentence.

SOLUTION: a man in a field standing as a ball comes throjgh the air towards him

PROBLEM: Sentence: 'a couple of men playing a  game of tennis'. Replace the letter 'n' with 'c' in the sentence.

SOLUTION: a couple of mec playicg a  game of teccis

PROBLEM: Sentence: 'a large oven is seen in a tiled kitchen'. Replace the letter 's' with 'n' in the sentence.

SOLUTION:
a large oven in neen in a tiled kitchen