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 ski slope consisting of several people wearing skis and snowboards'. Replace the letter 'e' with 's' in the sentence.

Output: a ski slops consisting of ssvsral psopls wsaring skis and snowboards

Input: Consider Input: Sentence: 'a couple of elephants are standing in the wild'. Replace the letter 'a' with 'n' in the sentence.
Output: n couple of elephnnts nre stnnding in the wild