Task: Sentence Ordering
Input (English): Sentence1: I was angry and confused by the letter. Sentence2: The other day I was cleaning up a bit around the apartment. Sentence3: It said she wanted to break up with me. Sentence4: I decided to get rid of all the clutter and papers on the table. Sentence5: Underneath all of them was an older letter from my girlfriend.
Output (English): 51423