refu[10], fere[8], free[8], ceku[8], kuce[8], ruck[8], ceru[7], keru[7], reku[7], erce[5], erek[5],
kuf[10], fru[9], fur[9], ruf[9], fee[7], ref[7], kuc[7], ecu[6], cru[6], kur[6], cek[5], cer[4], ker[4], rek[4],
fu[8], uf[8], ef[6], fe[6], ku[5], ce[3], ee[2], er[2], re[2],
