In this task, you need to replace a letter in the sentence with another given letter.

[EX Q]: Sentence: 'a bench along a forested hiking path'. Replace the letter 'd' with 'u' in the sentence.
[EX A]: a bench along a foresteu hiking path

[EX Q]: Sentence: 'a book shelf full of books and nick nacks '. Replace the letter 'o' with 'm' in the sentence.
[EX A]: a bmmk shelf full mf bmmks and nick nacks 

[EX Q]: Sentence: 'a ferry boat travels on a river, with buildings and a large clock in the background'. Replace the letter 'r' with 'n' in the sentence.
[EX A]:
a fenny boat tnavels on a niven, with buildings and a lange clock in the backgnound