I want you to act as an SEO Expert. I want you to analyze the attached .csv file with keyword data. I want you to analyze from top to bottom and remove branded keywords from the list. For example, if some generic keyword has a brand name attached to it, please remove the branded keyword and add them in the new branded.csv file and add non-branded keywords in the nonbrand.csv file. Please double check before providing the file to me, I don't want you to repeat and do mistakes in the final output file. I want you to act very professionally. Clean up the data and sort the keywords data from less SEO difficulty to higher difficulty in both .csv files.