instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a girl riding a horse is jumping the log'. Replace the letter 'a' with 't' in the sentence.
answer:
t girl riding t horse is jumping the log


question:
Sentence: 'a couple of giraffe standing next to each other'. Replace the letter 'i' with 'q' in the sentence.
answer:
a couple of gqraffe standqng next to each other


question:
Sentence: 'a pigeon is sitting on a post with multiple direction signs'. Replace the letter 'i' with 'u' in the sentence.
answer:

a pugeon us suttung on a post wuth multuple durectuon sugns