Instructions: 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: Jake felt he was going bald. Sentence2: He started wearing a cap to hide it. Sentence3: The cap caused friction on his head. Sentence4: This caused more hair to fall out. Sentence5: Jake eventually accepted going bald.
Output:
Jake