bbbb bblb blub blum blur bly- blym blyn bnml bnrr brrm brrr brum brun bry- bryn bubb bubu bulb bull bulu bum- bumb bunb bunn bunu bur- burb burl burm burn burr buru bury buyl buyu byrn byul byun lblr llll llyn llyr lmln lmmr lrrr lrry luby lull lulu lumb lunn luny lury lyly lymb lymm lynn lyun lyyn mlnr mlym mmmm mmun mmyy mnbb mrbb mrbm mrln mrml mull mulm mulu muly mumm mumu mumy munn munu murl murn murr muru mury mybb myl- myll myln mymy myrr myry nlrb nmml nnnn nrlb nrml nrrl nubl nuby null numb numm numu nunn nuny nurl nurn nurr nuru nyll nyny nyrb nyul rbbb rbbr rlml rmll rnbr rrrr rrum rrun rubb rubu ruby rull ruly rumb ruml rumm rumy runn runy ruru ruun ruyl rynn ryun ubly ullr ully ulmu ulul ulum umb- unmr unum urry urum urun urur uryn uulu uuuu uuyn ybnl ybry ymur yrly yrun yryn yubu yulu yuny yurn yury yuyu yyyy