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: Consider Input: Sentence1: Jennifer wanted to organize her living room. Sentence2: She bought a tall bookshelf to contain the clutter. Sentence3: She put some cute knick knacks on it as well. Sentence4: Jennifer felt like her living room was really coming together. Sentence5: She liked having a clean, organized space!

Output: Jennifer


Input: Consider Input: Sentence1: Dan had a very fine cobblestone walkway. Sentence2: Some of the stones had started to jut out unevenly. Sentence3: Dan got out a shovel and leveled the dirt under them. Sentence4: He tamped them down gently to make them all match. Sentence5: Now the stones in Dan's walkway are all perfectly even.

Output: Dan


Input: Consider Input: Sentence1: John had sown many vegetables in Autumn. Sentence2: The next spring, he went out to the field to check on them. Sentence3: He discovered a large group of ripe carrots. Sentence4: John picked them all and brought them home to make a soup. Sentence5: John decided he would garden again next year as well.


Output: John


