ample Input 0 essay classes ['essay'] = essay essay_draft classes ['essay_draft'] = essay_draft essay.append_content (essay_draft) essay.key = 0 exit ample Output 0 Valid command Valid command Valid command Valid command Valid command Valid command This Document instance has the following stats. 1. word count: 6 Document ("Roses are red") Document ("Violets are blue") 2. status: draft 3. grade: awaiting submission essay Document ("R- classes ['essay'] = essay_draft Docum classes ['essay_draf essay.append_conten essay.add_words ("Su essay.key_1 essay.delete() essay.key = 0 exit Sample Output 2 Valid command Valid command Valid command Valid command Valid command Valid command Invalid command Invalid command

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