Task: Sentence Ordering
Input (English): Sentence1: His mother heard him from in the kitchen and ran over to him. Sentence2: The mother comforted the child. Sentence3: The boy started crying very loudly. Sentence4: As he climbed, his foot slipped and he fell to the ground. Sentence5: A young toddler was climbing up a chair in his living room.
Output (English): 45321