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: I used to deliver fliers everyday in the hot sun. Sentence2: My water bottle always ended up really hot. Sentence3: When I put ice in it, the ice melted. Sentence4: I decided to buy a special thermos that kept the cold in. Sentence5: Now I always had cold water when I was in the hot sun.

Output: I (myself)

Input: Consider Input: Sentence1: Jane was jogging. Sentence2: It had just rained. Sentence3: The ground was slippery with leaves. Sentence4: She slipped on one and broke her leg. Sentence5: She had to call an ambulance for help.

Output: Jane, Slippery, Broke, Rain, Ambulance

Input: Consider Input: Sentence1: I picked up the monitor from the floor. Sentence2: I immediately slipped and dropped it. Sentence3: It shattered and cracked the screen. Sentence4: I was very upset. Sentence5: I had to go buy a new one.
Output: I (myself)