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

[Q]: Sentence: 'a tennis racket is sitting in the middle of a tennis field'. Replace the letter 'i' with 'f' in the sentence.
[A]: a tennfs racket fs sfttfng fn the mfddle of a tennfs ffeld

[Q]: Sentence: 'a study table with computer, mouse and keyboard .photo frame are also kept'. Replace the letter 'u' with 'q' in the sentence.
[A]: a stqdy table with compqter, moqse and keyboard .photo frame are also kept

[Q]: Sentence: 'two police men on motorcycles on a city street'. Replace the letter 'n' with 'b' in the sentence.
[A]:
two police meb ob motorcycles ob a city street