TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a long green grain traveling past a white building'. Replace the letter 'w' with 'o' in the sentence.

SOLUTION: a long green grain traveling past a ohite building

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 small oven is next to a fridge in a kitchen'. Replace the letter 'l' with 'r' in the sentence.

SOLUTION:
a smarr oven is next to a fridge in a kitchen