dddd ddre dedd dede dedu deed deef deel deer defe deff deld dele delf dell der- dere derf derr deue deul deur deux dex- dexe dfer dfrf dlux dred dree dref drel drue druu dudd dude dudu duel duer duff dufu dule dull dulu dure duru duul duur dxdr dxed dxef dxel dxfe dxfx dxll dxlr dxrd dxre dxrf dxrl dxrr dxrx dxue dxur dxxl dxxr dxxx edde ede- edel eder edex edfl edfu edle edru edur edxl eede eedu eeee eefe eefl eele elde eldr eled elee elef eler elex elfe elle ellu elue elul er-x erde erdf ered erel erer erfx erld erle erll erre erur eude euer eule eur- eure exed exel exer exrx exul fdlr fede feed feel feer fefe feff feld fele felf fell ferd fere ferr feru feud feux ffee ffff ffrr fldr fled flee fler flex flud flue fluf flur flux fred free frex frue fudd fude fuel fuff fufu fule full fulu fur- fure furl furr fuxl fxdd le-u lede leed leef leel leer lefe leff lele lell lelu lerd lere leud leur lexx lfrd llef lleu llll llud lrdd lrrr ludd lude lued luef luer lufe luff lufu lule lull lulu lurd lure luxe lxde lxxx rder redd rede redl redr redu redx reed reef reel refd refe reff refl refr refu reld rele rell rerd rere reru reue reuf reul reuu reux rexx rfef rffl rlee rlef rleu rred rrle rrrr rudd rude rudl rued ruel ruer rufe ruff rule rull rurd rure ruru ruud udel uder uele uell ufel ufer uffe ulde ulee ulex ulfe ulle ullr ulul urde urdu ure- ured urex urfe urff urle urre urur uulu uuuu uxue uxul x-ed xdxf xeer xefe xer- xexe xfer xuld xuxu xxxx