o, as in Brot.
u, as in nur.
ä, (æ, Ae) retain their German sounds.
ö, (oe, Oe) retain their German sounds.
ü, (ue, Ue) retain their German sounds.
ai, as in Kaiser.
au, as in auch.
ao, not quite as one sound.
ei, as in Ei.
b, d, g, h, j, k, l, m, n, p, r, s, t, w, x and z retain their German sounds.