instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a group of sheep is standing in a grassy field'. Replace the letter 'g' with 'p' in the sentence.
answer:
a proup of sheep is standinp in a prassy field

question:
Sentence: 'a baseball player is throwing a ball across the dirt field'. Replace the letter 'a' with 't' in the sentence.
answer:
t btsebtll pltyer is throwing t btll tcross the dirt field

question:
Sentence: 'two women of different ages standing on the street while eating donuts'. Replace the letter 's' with 'y' in the sentence.
answer:
two women of different agey ytanding on the ytreet while eating donuty