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: Tom was in the shower. Sentence2: He heard someone knocking at the door. Sentence3: He rushed to the door. Sentence4: He only had a small towel. Sentence5: He was embarrassed but answered the door.
Example Output: Someone, Tom

Example Input: Sentence1: Rakesh was 10-years-old and his parents owned a motel. Sentence2: They believed their son Rakesh should have money to buy things. Sentence3: Rakesh bought toys from the hobby store, but his friend didn't. Sentence4: Rakesh gave his friend, Charles, $75! Sentence5: But Charles showed his mother the cash and she made him return it.
Example Output: His parents, Motel, Rakesh, His mother

Example Input: Sentence1: Jose wanted to try fishing for the first time. Sentence2: He asked his dad to show him how because his dad went every week. Sentence3: Together they went to the store and got all the supplies they needed. Sentence4: They spent hours on the lake working all the different techniques. Sentence5: They bonded and now they go fishing every Sunday together.
Example Output:
Dad, Jose, Together