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.

Example Input: Sentence1: I had a glass of water. Sentence2: I thought it tasted bland. Sentence3: I opened my refrigerator. Sentence4: I found a lemon in the door. Sentence5: I squeezed lemon into my water.
Example Output: I (myself)

Example Input: Sentence1: Meghan and I went to the beach one time. Sentence2: It was a long drive and we both got grumpy. Sentence3: When we finally arrived we sat in the sand and had lunch. Sentence4: She was sad it was such an overcast day. Sentence5: I cheered her up with a giant love note in the sand.
Example Output: Meghan, I (myself)

Example Input: Sentence1: Will woke up in the middle of the night. Sentence2: Will couldn't believe the hunger pangs he was having. Sentence3: Will slinked down the stairs very quietly. Sentence4: Will made himself a midnight snack with salami and rye. Sentence5: Will went back to the most peaceful sleep of his life.
Example Output:
Will