de-err deddeh deeded deedee deeder deerth defete deffer defhed defter dehere derere derfde derrer derthe deterr detete detter dreder dreher drehte effere effete efreet efter- efther erfeth erreth errett ethere ethete fedder federd feeded feedee feeder feered feerth ferder ferede ferfer ferred ferrer ferret fertee ferter ferthe fether fethre fetter freeth frefre frette fterer fterre heddeh hedder heddre heeded heeder heehee heerde heered heeter heffer hefted hefter hehehe hehheh herded herder hereft herher herter herthe heter- hether hetter r-tree redded redder redere redred redted redthe reeded reeder reefed reefer reeffe refeed refeet refeff refert refete reffed refret refter rehder rehete reteed reteer reteet retere rether retree retret retted retter t-tree te-hee tedded tedder teeder teehee teerth teetee teeter teethe teheed terete terrer terret terter tertre tetede tetete tethee tether tetteh tetter theder theefe thefed thefth thered theref theted thetee thethe threde threed threet threfe threff threte thrett treder treete trefet trefte trehet tretee trette