Math is not my strong suit, it's true, but I'm pretty good with logic and precedent.
6 letters, I'm guessing it starts with an f and ends in er. Sonsie has gotten in trouble before for using that particular word, creatively spelled to bypass the filter. She has never, however, been in trouble for creatively spelling a racial slur.
When I first read Sonsie's post, I mentally substituted the f-er word for her xx, because I thought it was pretty obvious what she intended. I do think it's interesting that the first thing YOU thought of was a racial slur. Why do you suppose that would be?