instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a baseball game is in progress at a baseball stadium'. Replace the letter 's' with 'r' in the sentence.
answer:
a bareball game ir in progrerr at a bareball rtadium

question:
Sentence: 'two men and a dog are standing beside a building'. Replace the letter 'b' with 'y' in the sentence.
answer:
two men and a dog are standing yeside a yuilding

question:
Sentence: 'a couple of yellow buses driving down a city street'. Replace the letter 'o' with 'w' in the sentence.
answer:
a cwuple wf yellww buses driving dwwn a city street