fehn[8], fern[7], dehn[5], dreh[5], herd[5], nerd[4],
feh[7], ehr[4], her[4], reh[4], rhe[4], den[3], end[3], der[3], erd[3], red[3], ern[3], ren[3],
eh[3], he[3], ne[2], er[2], re[2],
