arena[5], rener[5],
arna[4], rana[4], aren[4], nera[4], rena[4],
ana[3], ara[3], era[3], rea[3], nar[3], ran[3], ner[3], ren[3],
aa[2], ee[2], na[2], en[2], ar[2], er[2], re[2],
