furek[12], kufer[12], kruku[11], kurku[11], kurek[9],
refu[10], kuku[10], kuru[9], keku[8], kruk[8], keru[7], reku[7],
kuf[10], fru[9], fur[9], ruf[9], ref[7], kuk[7], kur[6], kek[5], ker[4], rek[4],
fu[8], uf[8], ef[6], fe[6], uu[6], ku[5], er[2], re[2],
