aare[4], arie[4], eier[4], eire[4], rare[4], irre[4],
eia[3], aar[3], ara[3], are[3], ree[3], air[3], rai[3], ire[3], rar[3], irr[3],
aa[2], ai[2], ei[2], ar[2], er[2], re[2],
