dddd ddpo ddre dedd dede dedo dedu deed deep deer deop deor depe depo depp depr der- dere dero derp derr deue deur dod- dodd dode dodo doer dood doop door dope dopo dopp dopr dord dore doro dorp dorr doru doud doue doup dour dper dred dree drod drop drou drue drup druu dudd dude dudo dudu duer duo- dupe dupo dure duro duru duur edde eddo eddp ede- eder edod edou edru edup edur eede eedu eeee eero eode eore epee eper epod epor eppo eppp epro eprp erde ered erer erod eroe eroo erpe erre erro erur eude euer eur- eure euro o-eo oddd oded odeo oder odoo odop odor odou odrp odur oedo oere ooer oooo oord oore oped opep oper opo- opor oppo orde ordo ordu ore- ored oreo orer oro- oroe oror orpe orro orup oude oued ouer oupe our- oure ouro ouu- pdpr ped- pede pedo peed peep peer peor peou pepd pepe pepo per- perd pere pero perp perr peru peur pod- podd pode podo podu poed poer pood poop poor pop- pope popo popp pore poro porr poud poup pour pper ppod pppd pppo pppp ppru ppur pre- pred pree prep preu pro- prod proe proo prop prou prpd prrd prud prue pruu pu-e pudo pudu pued pueo puer pueu pupe pupu pur- pure puro purp purr puru rder redd rede redo redr redu reed reep reod reop reou repe repo repp repr repu rerd rere rero reru reue reup reuu rodd rode rodo roed roer rood roop roor rope ropo rore roro roru roud roue roup rpdp rpoe rred rrrr rudd rude rudo rudp rued ruer rupe rupp rurd rure ruro rurp ruru ruud u-rp uder udoo udop udpd uor- uore updo uped upor uppe uppp uppu upup urde urdu ure- ured uro- uroo urpo urre urup urur uuuu