refu[10], fezu[10], frez[8], ceru[7], cezu[7], zeru[6], rzec[5],
fru[9], fur[9], ruf[9], ref[7], fez[7], ecu[6], cru[6], ucz[6], cer[4], cez[4], cze[4], zer[3],
fu[8], uf[8], ef[6], fe[6], ce[3], er[2], re[2], ez[2], ze[2],
