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

Input: Consider Input: Sentence: 'a man on a surfboard riding on the waters waves'. Replace the letter 's' with 'k' in the sentence.

Output: a man on a kurfboard riding on the waterk wavek

Input: Consider Input: Sentence: 'a silly cow licking the camera through a fence'. Replace the letter 't' with 'v' in the sentence.

Output: a silly cow licking vhe camera vhrough a fence

Input: Consider Input: Sentence: 'a man with long hair looking in a refrigerator'. Replace the letter 'r' with 'q' in the sentence.
Output: a man with long haiq looking in a qefqigeqatoq