fere[8], free[8], sfer[8], erce[5], esce[5], serc[5], eser[4],
ceń[10], fee[7], ref[7], fes[7], cer[4], ces[4], ser[3],
eń[8], ef[6], fe[6], ce[3], ee[2], er[2], re[2], es[2], se[2],
