TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a baseball game is in progress at a baseball stadium'. Replace the letter 's' with 'r' in the sentence.

SOLUTION: a bareball game ir in progrerr at a bareball rtadium

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 baseball player holding a bat on top of a field'. Replace the letter 'b' with 'd' in the sentence.

SOLUTION:
a dasedall player holding a dat on top of a field