University grades are all over the place.
There's the G, VG, U version (Godkänt, Väl godkänt, Underkänt)
There's the numbered grades (3-5 for different passing grades).
There's also the ECTS grade scale which has: F, Fx, E, D, C, B, A (in that order, from lowest to highest).
In short, universities decide on their own what grades to use. :P