Task: Sentence Ordering
Input (English): Sentence1: Alec's daughter made words with them rather than structures. Sentence2: Alec was happy to see his daughter developing her verbal ability. Sentence3: Alec's daughter wanted more blocks to play with. Sentence4: Alec figured that blocks would develop her scientific mind. Sentence5: Alec bought blocks with letters on them.
Output (English): 45123