Q: 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: Big surprise party. Sentence 1: When his birthday came up, they decided to throw him a big party. Sentence 2: But as soon as he arrived, everyone surprised him with cheers. Sentence 3: Cameron had only two friends. Sentence 4: Cameron arrived at his party anticipating a quiet evening. Sentence 5: To make it more animated, they hired people to act as friends.
A:
31542