Task: Sentence Ordering
Input (English): Sentence1: Then, they played with some trucks. Sentence2: They had a good time together. Sentence3: Seven-year-old Ben went to play at his friend Mike's house. Sentence4: Mike greeted Ben, and they went to play in Mike's room. Sentence5: First, they played with Mike's quadcopters for a long time.
Output (English): 45123