bbbb bbdd bblb bd-r bdii bdry bibb bibi bibl bidi bidr bidu bild bili bill bilu bily birb bird biri birl birr biru biry bldr blir blub blud blur bly- brdy brid bril brrr brud bry- bryd bubb bubi bubu budb budd budi budl budu budy buid buir buiu bulb buld buli bull bulu bur- burb burd buri burl burr buru bury buyi buyl buyu byil byld byrd byul byyd dddd ddly ddry ddub dibb diby didi didu didy diii dili dill dily dird dirl dirr diyi diyu dlbd dlib dlii dlil drib dril drub drui druu dry- dub- dubb dubu duby dudd dudu duid duil duir duli dull dulu duly duri duru dury duul duur duyl duyr dybu dydd dyll dyr- dyrb dyri dyru dyur dyyr i-by ibid ibly ibrd ibri ibuy ibyi idid idil idir idli idly idub idyl iiii ilir ill- illd illi illy ilud iluy irby iri- irid iril iriy irlb irri irul iuiu lblr ldry libr libu lidb lidl liii liir lilb lili lill lilu lily lird liri lirl lirr liru liry liyl liyu lldb llll llud llyr lrdd lrrr lrry luby ludd ludi luli lull lulu lurd luri lury luyi lydd lyly rbbb rbbr rib- ribu riby ridd ridi rill rilu rily riri rrrr rubb rubi rubu ruby rudd rudi rudl rudy ruid rull ruly rurd ruri ruru ruud ruyd ruyi ruyl rydy ubbi ubid ubii ubir ubli ubly ubud uddi udid udir uirr ulli ullr ully ulul urbi urdu urdy urib uriu urri urry urur uulu uuri uuuu uyir ybry ydil ydul yidi yidu yild yili yill yirb yird yirr yiud ylid ylli yrly yubu yudu yuli yulu yurd yuri yury yuyu yyyy