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 boy is sitting at a dinner table with his food'. Replace the letter 't' with 'r' in the sentence.

SOLUTION: a boy is sirring ar a dinner rable wirh his food

PROBLEM: Sentence: 'a person and their service dog standing on a mountain'. Replace the letter 'a' with 'i' in the sentence.

SOLUTION:
i person ind their service dog stinding on i mountiin