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: Lillie was always nervous leaving work. Sentence2: Her car was parked in a parking garage. Sentence3: One night, she heard footsteps and was soon attacked by an assailant. Sentence4: She got away and called the police immediately. Sentence5: She decided to pay more for outside parking and carried weapons.

Output: Lillie, Assailant, Police

Input: Consider Input: Sentence1: Kelly was out for a jog. Sentence2: She loved jogging in the woods. Sentence3: As she was jogging however, she ended up tripping. Sentence4: When she tripped she skinned her knee. Sentence5: Kelly had to get a band aid.

Output: Kelly

Input: Consider Input: Sentence1: Sam always knew he needed to wear glasses while driving. Sentence2: But he didn't like wearing them. Sentence3: One night, he took a wrong turn home. Sentence4: And he couldn't read the street signs. Sentence5: He didn't get home until 4 AM.
Output: Sam