Definition: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Input: Sentence1: Kay was going to take her driving exam for her license. Sentence2: Her dad was taking her at 6 am the next morning. Sentence3: All night he went on and on telling her she would fail the test. Sentence4: Her dad told her everyone he knew failed the first time. Sentence5: Kay told him he was wrong and was confident she would pass.
Output:
Kay, Her dad