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

Ex Input:
Sentence: 'a couple sits on a bench in the countryside'. Replace the letter 'y' with 'k' in the sentence.

Ex Output:
a couple sits on a bench in the countrkside


Ex Input:
Sentence: 'a study table with computer, mouse and keyboard .photo frame are also kept'. Replace the letter 'u' with 'q' in the sentence.

Ex Output:
a stqdy table with compqter, moqse and keyboard .photo frame are also kept


Ex Input:
Sentence: 'a bathroom with lots of toys hanging around a shelf'. Replace the letter 't' with 'e' in the sentence.

Ex Output:

a baehroom wieh loes of eoys hanging around a shelf