Task: Sentence Ordering
Input (English): Sentence1: John didn't know what to do. Sentence2: John had worked hard on his homework but couldn't find it anywhere. Sentence3: Then he came upon some paper scraps on the floor. Sentence4: His dog, Betty, was sitting nearby with a paper scrap in her mouth. Sentence5: John was worried his teacher would think he was lying.
Output (English): 51234