erkor[9], erker[8], kirre[8],
kore[8], kirr[7], roie[5], eier[4], eire[4], irre[4],
koi[7], kor[7], kir[6], oie[4], roi[4], ree[3], ire[3], irr[3],
ei[2], er[2], re[2],
