kefie[10], firek[10], kefir[10], ferie[9], refie[9],
efie[8], fere[8], free[8], efir[8], erek[5], erki[5], kier[5], reki[5],
fik[8], fee[7], ref[7], kei[4], kie[4], ker[4], rek[4], ikr[4], kir[4], rei[3],
ef[6], fe[6], fi[6], ki[3], ee[2], er[2], re[2],
