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: Rick was visiting his grandma. Sentence2: He and his dad went into the yard to play. Sentence3: The grass in the yard was tall and needed to be cut. Sentence4: Later that night Rick was itchy from playing in the grass. Sentence5: Rick scratched and scratched until daddy gave him a bath.
Output:
His dad, Rick, Grandma