kuff[13], kefe[10], reff[10], kerf[10], kufe[10], efeu[7], freu[7], rufe[7], ufer[7], ufre[7], kure[7], euer[4], eure[4], reue[4],
uff[9], fee[6], ruf[6], kur[6], ree[3], reu[3], ure[3],
er[2], re[2], ur[2],
