Instructions: In this task, you're given a short story of five sentences written in natural language. However, the order of the given story is not correct. Your job is to return the correct order for the given five sentences to create a coherent short story with the new order that has the correct flow. Generate your answer using the number of sentences in the correct order, such as '23415'.
Input: Sentence1: He wanted a new book but had no idea what to get. Sentence2: Joseph was at the library. Sentence3: He closed his eyes and picked one. Sentence4: He decided on a new method of choosing a book. Sentence5: With so many choices, he felt overwhelmed.
Output:
21543