eeee eefe eefl eele eete eetu efet eft- eftu elee elef eler elet elfe elft elle ellu elte elue elul erel erer eret erft erle erll erre ertl ertu erur etee etel eter etfe etre ette ettu euer eule eur- eure eurt feel feer feet fefe feff fele felf fell felt fere ferr fert feru fete fetr fett fetu ffee ffff ffrr fftf flee fler flet flue fluf flur free fret frue ft-l fter fuel fuet fuff fufu fule full fulu fur- fure furl furr furt fute futu le-u leef leel leer leet lefe leff left lele lell lelu lere lert lete lett leur llef llet lleu llll lrrr ltee lttr luef luer lufe luff luft lufu lule lull lulu lure lurt lute reef reel reet refe reff refl refr reft refu rele rell relt rere rert reru rete retr rett reue reuf reul reut reuu rfef rffl rlee rlef rleu rrle rrrr rtee rtle rtlt ruel ruer ruet rufe ruff ruft rule rull rure ruru rute rutl rutt rutu teef teel teer teet teff tefl teft tel- tele tell telt telu ter- tere terf terr teru tete tetr tett tetu teut tre- tree tref tret treu trfr trte trtr true trut truu tter ttff tttt ttul tuel tuer tuet tufe tuff tuft tufu tule tull tulu ture turf turr turt turu tute tutl tutt tutu uele uell ufel ufer uffe ulee ulfe ulft ulle ullr ultt ulul ure- uret urfe urff urft urle urre urte urur urut utel uter uttu uulu uutf uuuu