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 always hated veggies on burgers. Sentence2: I always took them off. Sentence3: One day I kept the lettuce on. Sentence4: It tasted great. Sentence5: After that I always liked veggies on my burgers.
Output:
I (myself)