Task: Sentence Ordering
Input (English): Sentence1: She fed him but still he did not sleep. Sentence2: Finally, she remembered the lullaby her mother had sung to her. Sentence3: Once there was a mother who was desperate for her baby to sleep. Sentence4: The mother gently sung the lullaby to her baby. Sentence5: She walked him around but still he did not sleep.
Output (English): 34152