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: Iris put on blue contacts. Sentence2: She looked at herself in the mirror. Sentence3: She thought she looked weird. Sentence4: She replaced the contacts. Sentence5: She thought she looked better in brown.

Output: Iris

Input: Consider Input: Sentence1: Barry was excited to take his daughter to the park. Sentence2: However, Barry figured since it was Sunday, it would be empty. Sentence3: Barry certainly guessed wrong! Sentence4: Barry decided to take his child to another nearby park. Sentence5: Barry was glad the park was empty, and he could play with his child.

Output: His daughter, Barry

Input: Consider Input: Sentence1: Jake was a great pianist. Sentence2: He was playing the piano in the lobby of a hotel. Sentence3: A crowd formed around him. Sentence4: Jake captivated the audience with his soothing melodies. Sentence5: A woman burst into tears after hearing his beauty songs.
Output: Woman, Jake, Crowd