urea[6], arui[6], auro[6], euro[6], uroi[6], rura[6], ruro[6], arie[4], arii[4], ario[4],
aur[5], rui[5], oru[5], rur[5], era[3], rea[3], air[3], rai[3], rei[3], aro[3], ora[3], ero[3], roi[3],
au[4], ii[2], eo[2], ar[2], er[2], re[2], or[2], ro[2],
