Somehow some of the letters of the text are pushed back by one, for example
Cgaqacseq Acuamsemems Syssem Selecsiom = Character Advancement System Selection
(g=h , q=r , s=t , c=d , u=v , m=n , etc.)
The strange thing is that only some letters seem to be concerned, as m stays m, for example. And only small letters are concerned (s but not S)...
Has somebody alreday worked this out (doesn't seem hard but I'm lazy) ?