instruction:
In this task, you need to replace a letter in the sentence with another given letter.
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: 'a man who is surfing in a wave in the ocean'. Replace the letter 'a' with 'u' in the sentence.
answer:
u mun who is surfing in u wuve in the oceun


question:
Sentence: 'a small bird stands in front of a water way'. Replace the letter 'r' with 's' in the sentence.
answer:

a small bisd stands in fsont of a wates way