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: Steven had a leaky drain. Sentence2: He had done everything to try and fix it. Sentence3: He had even asked his friends. Sentence4: Finally, Steven went to the store and got a new drain. Sentence5: Now, Steven doesn't have a leaky drain.
Output:
Friends, Steven