instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a fancy clock is lit up on the street'. Replace the letter 'o' with 'f' in the sentence.
answer:
a fancy clfck is lit up fn the street


question:
Sentence: 'people watching a kite being flown with a sky background'. Replace the letter 'a' with 'b' in the sentence.
answer:
people wbtching b kite being flown with b sky bbckground


question:
Sentence: 'a person shielded by an umbrella walks through the snow'. Replace the letter 'w' with 'p' in the sentence.
answer:

a person shielded by an umbrella palks through the snop