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.
Q: Sentence1: Lisa told her friend she was addicted to five-hour energy drinks. Sentence2: Lisa said her friend would see why before the day was over. Sentence3: After work, Lisa went home to her four kids. Sentence4: Her house was messy and Lisa hated a messy house. Sentence5: She drank a five-hour energy drink and detail cleaned her home.
A:
Friend, Lisa, Four kids