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: Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Example solution: I (myself), Dog
Example explanation: There is only two characters in given story, i.e., I (myself) and dog.

Problem: Sentence1: Peter went to the store for his girlfriend. Sentence2: He needed to buy her some tampons. Sentence3: He sheepishly walked down the woman's care aisle. Sentence4: He grabbed the first box he saw and continued on quickly. Sentence5: Peter got a kiss from his girlfriend when he returned home.

Solution: Peter, His girlfriend