kupee[11], erker[8], kurre[8], purer[8], purre[8], eurer[5],
keep[10], peer[7], reep[7], kure[7], pure[7], purr[7], euer[4], eure[4], reue[4],
per[6], rep[6], kur[6], pur[6], ree[3], reu[3], ure[3],
er[2], re[2], ur[2],
