Detailed Instructions: 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: I was talking to my friend Jack today. Sentence2: I told him my stroke affected my ability to enjoy eating. Sentence3: He told me his sister has no sense of taste and has Ensure to stay ali. Sentence4: He even told me she had considered suicide. Sentence5: I stopped complaining.
A:
I (myself), Sister, My friend jack