Task: Sentence Ordering
Input (English): Sentence1: On a whim, they went to an animal shelter and fell in love with a cat. Sentence2: They were happy newlyweds, but wanted an addition to their family. Sentence3: Heather and Marcus were ready for the next step in their relationship. Sentence4: Although not quite ready for kids, they still felt lonely. Sentence5: They adopted the cat.
Output (English): 42135