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: Val drove her car down a steep hill. Sentence2: Her brakes did not seem to slow her down at all. Sentence3: Val had to steer into a parked car to slow her down. Sentence4: The two cars crashed together in a loud bang. Sentence5: This was enough to bring Val's car to a stop.
Output:
Val