urea[6], nura[6], ranu[6], runa[6], uran[6], urna[6], renu[6], uren[6], aren[4], nera[4], rena[4],
aur[5], nur[5], run[5], urn[5], era[3], rea[3], nar[3], ran[3], ner[3], ren[3],
au[4], nu[4], na[2], en[2], ar[2], er[2], re[2],
