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: This morning I started my day full energy. Sentence2: I cleaned the glass coffee and lamp tables. Sentence3: I scrubbed the bathroom like it belonged in a five star hotel. Sentence4: I cooked Tuna Croquettes, Fennel rice and made a strawberry salad. Sentence5: Now it's evening and I am tired with no more energy.
Example Output: I (myself)

Example Input: Sentence1: Nell was supposed to sell candy for a school fundraiser. Sentence2: She procrastinated because she hated going door to door. Sentence3: The day before the fundraiser ended, Nell broke her piggy bank. Sentence4: She counted enough money to buy a few boxes of candy. Sentence5: Sick to her stomach from candy, Nell turned in the money.
Example Output: Nell

Example Input: Sentence1: Susie got a brand new pair of shoes. Sentence2: She loved them. Sentence3: All the sudden they ripped. Sentence4: She realized they were too cheap. Sentence5: She had to toss them.
Example Output:
Susie