instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a geoup of people on bicycles coming down a street'. Replace the letter 'i' with 'x' in the sentence.
answer:
a geoup of people on bxcycles comxng down a street


question:
Sentence: 'a person snow skiing down a hill while the hold their ski poles'. Replace the letter 'r' with 'g' in the sentence.
answer:
a pegson snow skiing down a hill while the hold theig ski poles


question:
Sentence: 'a series of two photographs one showing a city in the past and the other in the future'. Replace the letter 'g' with 'b' in the sentence.
answer:

a series of two photobraphs one showinb a city in the past and the other in the future