Task: Sentence Ordering
Input (English): Sentence1: They tell him he needs to clean his laundry pretty soon. Sentence2: Sean's roommates notice that his clothes and bed start to smell. Sentence3: His roommates are grateful that Sean no longer smells as bad. Sentence4: They tell him to never wait so long to do laundry again. Sentence5: Sean protests at first, but finally he cleans his laundry.
Output (English): 21453