[Enantiomer]

Hi folks,
I'm currently racking my brain trying to figure out a question that just doesn't really seem possible to me...
"Consider a metal atom surrounded by a cube-shaped arrangement of eight ligand atoms (O_h symmetry) and derive the reducible representation for the 8 sigma bonds."

Now I've looked up and down and I can't think of a way to get the reducible form of this compound without the irreducible parts to it, regardless I basically just poked around until one worked but I'm basically just short of certain that it isn't right... 
O_h|E  8C₃  6C₂  6C₄  3C₄²  i  6S₄  8S⁶  3σ_h  6σ_d   (where h = 48)
Γ | 8   2      0     0     0    8     0     2     0      0
This works but I'm borderline certain that it isn't right, I've asked freaking everyone about this and they don't seem to know, does anyone have ANY idea what I can do to make a correct reducible compound?