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

Input: Consider Input: Sentence: 'a baseball game is in progress at a baseball stadium'. Replace the letter 's' with 'r' in the sentence.

Output: a bareball game ir in progrerr at a bareball rtadium

Input: Consider Input: Sentence: 'a person on a surfboard riding in ocean waves'. Replace the letter 's' with 'g' in the sentence.

Output: a pergon on a gurfboard riding in ocean waveg

Input: Consider Input: Sentence: 'the biker is riding down the street wearing a helmet'. Replace the letter 's' with 'd' in the sentence.
Output: the biker id riding down the dtreet wearing a helmet