instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a couple walking down a sidewalk next to some graffiti'. Replace the letter 'a' with 'y' in the sentence.
answer:
y couple wylking down y sidewylk next to some gryffiti


question:
Sentence: 'view from across the street and view from rear view mirror'. Replace the letter 'v' with 't' in the sentence.
answer:
tiew from across the street and tiew from rear tiew mirror


question:
Sentence: 'a woman in a floral swimsuit holds a pink umbrella'. Replace the letter 't' with 'l' in the sentence.
answer:

a woman in a floral swimsuil holds a pink umbrella