berki[8], biker[8], breki[8], reiki[6],
beki[7], brek[7], brei[6], brie[6], erki[5], kier[5], reki[5],
bek[6], ber[5], erb[5], reb[5], kei[4], kie[4], kii[4], ker[4], rek[4], ikr[4], kir[4], rei[3],
be[4], bi[4], ki[3], ii[2], er[2], re[2],
