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 herd of black cattle grazing and lounging in a green field'. Replace the letter 'a' with 'q' in the sentence.

SOLUTION: q herd of blqck cqttle grqzing qnd lounging in q green field

PROBLEM: Sentence: 'two white urinals can be seen as you enter the door with a sign on it'. Replace the letter 'n' with 's' in the sentence.

SOLUTION:
two white urisals cas be sees as you ester the door with a sigs os it