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: UFO. Sentence 1: Camping one night, Stan gazed at the stars. Sentence 2: He told his parents, but his dad shook his head. Sentence 3: Suddenly he sat up - he saw a blinking, strange shape - a UFO! Sentence 4: He told Stan that the darkness out here made satellites more visible. Sentence 5: Stan was seeing not a UFO, but an orbiting satellite!
13245