instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'street sign titled kittery maine state line in green'. Replace the letter 'e' with 'r' in the sentence.
answer:
strrrt sign titlrd kittrry mainr statr linr in grrrn


question:
Sentence: 'a memorial with various plaques and american flags on it'. Replace the letter 'a' with 'k' in the sentence.
answer:
k memorikl with vkrious plkques knd kmerickn flkgs on it


question:
Sentence: 'a bathroom with a toilet, a rug and toilet tissue holder'. Replace the letter 'u' with 'v' in the sentence.
answer:

a bathroom with a toilet, a rvg and toilet tissve holder