dddd ddot ddpo dod- dodd dodo dood doop door doot dopo dopp dopr dopt dord doro dorp dorr dort doru dotd doto dott doud doup dour dout dpdt drod drop drot drou drup drut druu dtdp dtor dtot dttp dudd dudo dudu duo- dupo duro durt duru dutp duur duut oddd odoo odop odor odot odou odrp odtu odur oooo oord oort ootp opo- opor oppo opto ordo ordu oro- oror orot orro orto orup oto- otoo otor otpp otro otto ottu otur our- ouro ourt out- outo ouu- pdpr pod- podd podo podu pood poop poor poot pop- popo popp popt poro porr port potd poto pott potu poud poup pour pout ppod pppd pppo pppp ppru pptt ppur pro- prod proo prop prot prou prpd prrd prtp prtr prud prut pruu ptop ptpd ptrd pudo pudu pupu pur- puro purp purr puru put- puto putt putu rodd rodo rood roop roor root ropo roro rort roru roto rotr rott roud roup rout rpdp rptd rrrr rtdt rttp rudd rudo rudp rupp rupt rurd ruro rurp ruru ruto rutt rutu ruud tdor todd todo todt todu tood toor toot top- topd topo topp topt topu tord toro torp torr tort toru totd toto totr tott toup tour tout tpdu tppd tppp tppr tptp tptr tput trod troo trop trot trou trpp trtr trud trut truu ttop tttt tudu tuor tupo tupu turd turo turp turr turt turu tuto tutt tutu tuuo u-rp udoo udop udot udpd uor- updo upor uppp uppu upto upup urdu uro- uroo urpo urup urur urut utor utpd utto uttu uuuu