ober[7], robe[7], eber[6], erbe[6], rebe[6], bure[6], euro[5], roue[5], euer[4], eure[4], reue[4],
beo[6], bor[6], erb[5], ree[3], reu[3], ure[3],
ob[5], er[2], re[2], ur[2],