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.

Example Input: Sentence1: Janet was dating her boyfriend for a very long time. Sentence2: They were doing really well but had their doubts. Sentence3: As time went on Janet decided that they should break up. Sentence4: She asked me for advice on how to do it, but I didn't have any! Sentence5: A few weeks later she broke up with her boyfriend.
Example Output: I (myself), Janet's boyfriend, Janet

Example Input: Sentence1: Melinda heard a noise. Sentence2: There was a burglar in her house! Sentence3: She called the police. Sentence4: They rushed over and arrested him. Sentence5: Melinda no longer felt safe.
Example Output: Melinda, Burglar, Police

Example Input: Sentence1: Lara had to clean the house! Sentence2: There was dirt everywhere! Sentence3: She scrubbed the dishes! Sentence4: She swept everything! Sentence5: Lara was happy that her house ended up very clean!
Example Output:
Lara