instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a man standing on a tennis court holding a tennis racquet'. Replace the letter 'c' with 'y' in the sentence.
answer:
a man standing on a tennis yourt holding a tennis rayquet


question:
Sentence: 'a couple of kids with rackets on a court'. Replace the letter 'u' with 'd' in the sentence.
answer:
a codple of kids with rackets on a codrt


question:
Sentence: 'a blue and white plane is sitting on a runway'. Replace the letter 't' with 'f' in the sentence.
answer:

a blue and whife plane is siffing on a runway