instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.
answer:
many stxeet signs in fxont of a building while it is snowing


question:
Sentence: 'a tennis player wearing black shorts and blue shirt swinging at the ball'. Replace the letter 'w' with 'o' in the sentence.
answer:
a tennis player oearing black shorts and blue shirt soinging at the ball


question:
Sentence: 'a line of people going up to a food truck'. Replace the letter 'f' with 'y' in the sentence.
answer:

a line oy people going up to a yood truck