rrle rrrr rrum rrun rubb rube rubi rubu ruel ruen ruer ruge rugg rugi ruin rule rull rumb rume rumi ruml rumm rune rung runi runn rure ruri ruru ruun u-ie ubbe ubbi uber ubii ubir uble ubli uein ueir uele ueli uell ugli ugne ugni ugri ugur uguu uige uile uiml uirr uleb ulee ulen ulie ulim ulle ulli ullr ulme ulmi ulmu ulne ulul ulum umb- umbe umbi umer ummg umri unbe uneb unee unen uner ungu uni- unie unii unin unir unle unmr unne unni unum urbe urbi ure- urge urgi urgu urib urie urim urin uriu urle urmi urne urni urre urri urum urun urur uuen uulu uuni uuri uuuu