Definition: 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: Sentence1: I bought a new printer at Walmart. Sentence2: I tried to install it by myself when I got home. Sentence3: After three failed attempts to install it, I called a friend for help. Sentence4: He came over and got the printer installed on the first try. Sentence5: I thanked him and eagerly sat down to try the printer out.
Output:
I (myself), A friend