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

Input: Consider Input: Sentence: 'a shot looks down on a person riding a long board'. Replace the letter 'o' with 'u' in the sentence.

Output: a shut luuks duwn un a persun riding a lung buard

Input: Consider Input: Sentence: 'a small child reaching back with a wii remote'. Replace the letter 'l' with 'o' in the sentence.

Output: a smaoo chiod reaching back with a wii remote

Input: Consider Input: Sentence: 'a train on a track above a body of water'. Replace the letter 'f' with 'q' in the sentence.
Output: a train on a track above a body oq water