You will be given a definition of a task first, then some input of the task.
In this task, you're given the title of a story consisting of five sentences, numbered 1 through 5. Your job is to arrange the sentences in order to make a story that makes complete sense and is apt for the title. Indicate your answer using the number of the sentences in order, such as '34152'.

Title: Scary Balloon. Sentence 1: Tom was filling up balloons for a birthday party. Sentence 2: Tom freaked out and screamed as his friend laughed. Sentence 3: The friend popped a balloon right by Tom's ear. Sentence 4: When filling the latest one a friend snuck up behind him. Sentence 5: He had several already filled.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
15432