eerier either ephete ephree erreth errett ethere ethete ethier heehee heeter hehehe hehheh heirie hepper heptet hereti herher herier herire herrie herter herthe hertie hetepi heter- hether hetire hetter hierer hiper- hiphei hipihi hipper hippie hirter hither hithte hitite hittee hitter hitthe i-tree iherir ihitit ipeter irrite ittiri peepee peeper peerer peerie peeter peetre peetri peiere peiper pepper perere perier perire perite perper perpet perree perret perrhe perrie perter pertie pertre peteet peteri pether petiet petite petree petrer petri- petrie petter pettet petti- pettit phiphe phitti pieper pierie pierre pierri pieter pietri piette piperi pipher piphre pipier pipipi pipiri pipper pippet pippip piree pirrie pirrip pithie pitier pitpit pitter pitthe pittie pppppp preeti preier preire preter prethe pretre prette priere prieth pterri r-tree reeper rehete rehire reiter repete repier repipe repper reprie reteer reteet retere rether retire retree retret retrip retter rhipi- rieter riette rietti ripert ripier ripper rippet rippit rither rititi ritter t-tree te-hee teehee teepee teerth teetee teeter teethe tehiri teirei teppei tepper terepi terete terihi terper terrer terret terrie territ terter tertre tetete tethee tether tetteh tetter theire thepie thepit therei therhi theri- thetee thethe thetip thiete thirre thithi threep threet threip threit threpe threte thrett thriep tierer tieret tiete tiethe tietie tip-it tipiti tippee tipper tippet tippit tipthe tireth tirret tirrit tither titiri tittee titter tittie treete trehet treppe tretee tretie trette trieth tripet trippe triter tritip