fuhr[8], duft[7], furt[7], ruft[7], turf[7], hurt[5], ruht[5], dutt[4],
huf[7], ruf[6], hur[4], ruh[4], uhr[4], hut[4], dur[3], tut[3],
hu[3], uh[3], du[2], ud[2], ur[2], tu[2],
