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

Input: Consider Input: Sentence: 'a baseball player is throwing a ball across the dirt field'. Replace the letter 'a' with 't' in the sentence.

Output: t btsebtll pltyer is throwing t btll tcross the dirt field

Input: Consider Input: Sentence: 'a zebra standing by a pile of large rocks'. Replace the letter 'i' with 'x' in the sentence.

Output: a zebra standxng by a pxle of large rocks

Input: Consider Input: Sentence: 'a prepared lunch sits on a tray, with sandwich and fries'. Replace the letter 'd' with 'p' in the sentence.
Output: a preparep lunch sits on a tray, with sanpwich anp fries