dddd ddpo ddre dedd dede dedo deed deef deep deer defe deff defo deop deor depe depo depp depr der- dere derf dero derp derr dfer dfoe dfrf dod- dodd dode dodo doer doff dood doof doop door dope dopo dopp dopr dord dore dorf doro dorp dorr dper dred dree dref drod drof drop edde eddo eddp ede- eder edod eede eeee eefe eero efeo efor eode eore epee eper epod epor eppo eppp epro eprp erde erdf ered erer erod eroe eroo erpe erre erro fede feed feer fefe feff fefo feod feof ferd fere fero ferr ffee ffff ffrr fode foed foer fofo food foof fopp for- ford fore foro forr fprf fred free freo frep froe frop frpd o-eo oddd oded odeo oder odoo odop odor odrp oedo oere ofdr ofer off- offe offo offr ofor ofre ooer ooff oooo oord oore oped opep oper opo- opor oppo orde ordo ore- ored oreo orer orfe orff oro- oroe orof oror orpe orro pdpr ped- pede pedf pedo peed peep peer peff peor pepd pepe pepo per- perd pere perf pero perp perr pfff pffr pod- podd pode podo poed poer poff pood poof poop poor pop- pope popo popp pore poro porr pper ppod pppd pppo pppp pprf pre- pred pree pref prep pro- prod proe prof proo prop prpd prrd rder redd rede redo redr reed reef reep refd refe reff refr reod reof reop repe repo repp repr rerd rere rero rfef rodd rode rodo roed roer rofe roff rofo rood roof roop roor rope ropo rore roro rpdp rpoe rpof rred rrrr