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: James had two best friends who hated each other. Sentence2: He could never see them together but always apart. Sentence3: For his birthday, he made an exemption and invited them both. Sentence4: It was a gamble, but it worked. Sentence5: The two friends went over their disagreement for the sake of James.
Example Output: James, Best friends

Example Input: Sentence1: Rucksack Rod was a traveling hobo. Sentence2: He got by on the kindness of others. Sentence3: The trains would often slow just enough for him to get on. Sentence4: While on the rails one day, he spied a girl who looked hungry. Sentence5: Rod shared what food he could with her.
Example Output: Rucksack rod, Girl, Others

Example Input: Sentence1: I had a stroke a few years ago. Sentence2: I got Warfarin shots in the belly every day while in rehab. Sentence3: One day the rehab doctor pulled me in. Sentence4: He showed the nurse the bruises on my belly. Sentence5: He said the nurse was injecting the Warfarin in the wrong way.
Example Output:
I (myself), Nurse, Doctor