frug[8], fuhr[8], rigg[6], urig[5], huri[5], guru[5],
fug[7], huf[7], ruf[6], gig[5], ihr[4], hui[4], gur[4], hur[4], ruh[4], uhr[4], uhu[4],
hi[3], hu[3], uh[3], ui[2], ur[2],