dddd ddre dedd dede dedu deed deef deep deer defe deff depe depp depr der- dere derf derp derr deue deur dfer dfrf dper dred dree dref drue drup druu dudd dude dudu duer duff dufu dupe dure duru duur edde eddp ede- eder edfu edru edup edur eede eedu eeee eefe epee eper eppp eprp erde erdf ered erer erpe erre erur eude euer eur- eure fede feed feer fefe feff ferd fere ferr feru feud ffee ffff ffrr fprf fred free frep frpd frue fudd fude fuff fufu fur- fure furr pdpr ped- pede pedf peed peep peer peff pepd pepe per- perd pere perf perp perr peru peur pfff pffr pper pppd pppp pprf ppru ppur pre- pred pree pref prep preu prpd prrd prud prue pruf pruu pu-e pudu pued puer pueu puff pupe pupu pur- pure purp purr puru rder redd rede redr redu reed reef reep refd refe reff refr refu repe repp repr repu rerd rere reru reue reuf reup reuu rfef rpdp rred rrrr rudd rude rudp rued ruer rufe ruff rupe rupp rurd rure rurp ruru ruud u-rp uder udpd ufer uffe updf uped uppe uppp uppu upup urde urdu ure- ured urfe urff urre urup urur uuuu