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: Consider Input: Sentence1: Tommy wanted to fix the scratches on his car. Sentence2: The scratches came from a curb he missed last week. Sentence3: He bought some car paint from his local auto store. Sentence4: He spent a weekend covering the scratches on his car. Sentence5: Tommy's car looks brand new now.

Output: Tommy

Input: Consider Input: Sentence1: Ella wrote her grandma a letter. Sentence2: She went to the post office to mail it. Sentence3: But they told her she needed a stamp! Sentence4: A kind stranger gave little Ella the stamp. Sentence5: Ella happily posted her letter.

Output: Ella, Stranger, Grandma

Input: Consider Input: Sentence1: Jeff is moving to Detroit to fix the economy. Sentence2: Once he got there, he promised to turn everything around. Sentence3: One month later, Detroit's unemployment rate was down. Sentence4: People were in the streets cheering for Jeff to be mayor of Detroit. Sentence5: Jeff kept focused, and promised to higher minimum wage by next year.
Output: People, Jeff