a,b,c,d,e,f,g?,h,i,j,k,l,m,n,o,p?,q?,r, s, t, u, v, w, x?, y, z.

Space works, but there are some questions.  G, P, Q, X.  Due to the fact that they're all spread out across the keyboard, I can't determine which is broken.  Is it a number, perhaps?  Or were you singing and broke key when you laughed?  I'm too drunk.