Task: Sentence Ordering
Input (English): Sentence1: Mike greeted Ben, and they went to play in Mike's room. Sentence2: First, they played with Mike's quadcopters for a long time. Sentence3: They had a good time together. Sentence4: Then, they played with some trucks. Sentence5: Seven-year-old Ben went to play at his friend Mike's house.
Output (English): 23541