dddd ddes ddre ddss dedd dede dedu deed deef deer dees defe deff defs der- dere derf derr ders des- dese dess desu deue deur deus dfds dfer dfrf dred dree dref dres drrs drue drus druu dsdr dsrr dudd dude duds dudu duer dues duff dufu dure duru duse duur edde edds ede- eder edes edfu edru edss edur eede eedu eeee eees eefe eers eese efes effs erde erdf erds ered erer eres erfs erre errs erse erur erus esds esdu esee eser eses esfs esrd esse essu esuf esus eude euer eur- eure euse fede feds feed feer fees fefe feff ferd fere ferr fers feru fese fess feud feus ffee ffff ffrr ffss fred free fres frue fssf fudd fude fuff fufu fur- fure furr furs fusd fuse fuss fusu rder redd rede redr reds redu reed reef rees refd refe reff refr refs refu rerd rere rers reru rese ress reue reuf reus reuu rfds rfef rred rrrr rsdd rsds rsee rsre rudd rude ruds rued ruer rues rufe ruff rurd rure rurs ruru ruse russ rusu ruud sdds sdef sder sdes sdrs sdsf sdss sdsu se-d se-e se-f se-s se-u sede seds seed seef seer sees seeu seff serd sere serf serr sers seru sese sess seur sfer sfss sfsu srde sres srsd ssdd ssdf ssee sses ssrs sssf ssss sudd sude suds sued suee suer sues sueu suf- suff sufr sufs sufu sur- surd sure surf surr surs suru sus- susd suse suss susu suus udds uder udsd uers uess ufer uffe urde urds urdu ure- ured ures urfe urff urre urse urss ursu urur urus usde usdf usds used usee usef user uses usfs usse ussf ussr usss ussu usus uuuu