febr[10], fibr[10], efir[8], bied[7], berd[7], debr[7], brei[6], brie[6], birr[6], dier[5],
ref[7], frr[7], bid[6], ber[5], erb[5], reb[5], brr[5], der[4], red[4], drr[4], rei[3],
eń[8], ef[6], fe[6], fi[6], be[4], bi[4], de[3], id[3], er[2], re[2],
