sort order for table

[petman]

I publish files to a website which converts 8 digits of the html file name (yyyymmdd) and converts it to a text hyperlink. The table default sorts by file name but I need to change the sort order based on a variable within the HTML text. 5 files per week are named "typicalfilew-yyyymmdd.htm" and the other 2 are called "typicalfilef-yyyymmdd.htm" and "typicalfiles-yyyymmdd.htm" The letters "w", "s", and "f" are necessary but throwing off the sort order. Any suggestions?

Thanks.