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

Example Input: Sentence: 'a young man playing tennis and preparing to hit the ball'. Replace the letter 'e' with 'c' in the sentence.
Example Output: a young man playing tcnnis and prcparing to hit thc ball

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

Example Input: Sentence: 'two children are laying in their bunk beds'. Replace the letter 'w' with 'u' in the sentence.
Example Output:
tuo children are laying in their bunk beds