Task: Sentence Ordering
Input (English): Sentence1: They had been trying for six months with no success. Sentence2: At their doctor's appointment, they expressed discouragement. Sentence3: But then they saw the doctor smiling broadly. Sentence4: The couple will be happy to know they have a baby on the way. Sentence5: Iva and Brant were trying to conceive a child.
Output (English): 23451