instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a person is standing in the snow in skis'. Replace the letter 'g' with 'x' in the sentence.
answer:
a person is standinx in the snow in skis


question:
Sentence: 'a motorcycle sitting on the side of the road by grass'. Replace the letter 'r' with 't' in the sentence.
answer:
a mototcycle sitting on the side of the toad by gtass


question:
Sentence: 'a plane is flying in the blue sky'. Replace the letter 'b' with 'q' in the sentence.
answer:

a plane is flying in the qlue sky