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

Input: Consider Input: Sentence: 'a person with a cell phone standing next to a train'. Replace the letter 's' with 't' in the sentence.

Output: a perton with a cell phone ttanding next to a train


Input: Consider Input: Sentence: 'a man is standing on a snowboard, atop a mountain'. Replace the letter 'd' with 'u' in the sentence.

Output: a man is stanuing on a snowboaru, atop a mountain


Input: Consider Input: Sentence: 'a kitchen with black and white accents and clean counters'. Replace the letter 'a' with 'p' in the sentence.


Output: p kitchen with blpck pnd white pccents pnd clepn counters