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: Jane walked into the home improvement store, ready to complain. Sentence2: Her new lawn mower would not crank, so she brought it back. Sentence3: She talked to the clerk, who asked for her receipt. Sentence4: She gave him the receipt, and she exchanged the mower for a new one. Sentence5: Jane took the new mower home, and it cranked immediately.

Output: Jane, Clerk

Input: Consider Input: Sentence1: All the girls were ready to start. Sentence2: They had spent a while making the hopscotch markings. Sentence3: They had used sidewalk chalk and ready to play. Sentence4: The girls began jumping to each numbered box. Sentence5: It was great fun playing hopscotch for them.

Output: Girls

Input: Consider Input: Sentence1: I clicked on the radio in my car as I drove home. Sentence2: The radio DJ said the next song would be great. Sentence3: I took the long way home so I could hear it all. Sentence4: I listened to the whole song before I hit my driveway. Sentence5: I parked my car and hummed the new song to myself.
Output: I (myself), Radio dj