@turbodragon The fun in these cases is going through form time to time, having forgotten what everything means. I had an attempted song change filenames ~5 times with some having a number, or an A or B appended. Even I don't know which stems from what anymore.
Also, what is that list sorted by? If it's by date, how could you of all people make (a lot of b's) before (a lot of a's)?