efeler effere effete efreet efter- ekerem eleele elekte elemer ellett emeere emelle emeter emmele emmert emmett ermler errett f-term feeler feelme fekete felker feller felter feltre femmer ferfel ferfer ferrel ferrer ferret fertee fertek ferter fetter fettle fleete fleker flekke flemer fletre freele freepr frefre frekel frelte fretel frette fterer fterre k-tree keefer keeffe keeker keekle keeler keepem keeper keepme keffel kelkel kellee kellem keller kelper kelter kemmel kemmer kemper kemple kepler keppel kepper kereft kerker kertee ketler ketter kettle kleeer kleket klemme kleppe klept- kpelle krefft krekel kreker kremer krempe kreple kretek leelee leeper leerer leetle leffel lefter lekker lemeke lemele lemere lemmer lemper lempet lempke lepere lepper lerret letter lettre m-tree meeker meekle meelte meeple meerle meeter meetme meetre mefeel mekell meleke melete mellel meller mellet meltem melter meltet meltre mememe memere meppel merete merkel merkem merker merket merkle merlet mermer mermet merrem merret mertel merter mertle meteer metrer mettel metter mettet mettle mktemp mp-pet mtmtmk peeker peelee peeler peelme peepee peeper peeple peerer peerle peeter peetre peffer pekkle pelele pelfer peller pellet pelmel pelmet pelter peltre pempek pempem pepper perell perere perlee perper perpet perree perret pertek perter pertre peteet petree petrel petrem petrer petter pettet pettle plemet plette pppppp prefer prefet preffe preket prelle prepme preter pretre prette prkeet r-tree re-let reefer reeffe reeker reeler reeper refeel refeet refeff refell refelt refert refete reflee reflet refret refter rekkem releef releke reller remeet remelt remete rempel repele repete repmet repper repple repref rereel reteer reteet retell retere reterm retree retret rettel retter t-tree teemer teepee teerme teetee teeter telefe telele telete telfer tellee tellem teller tellme temeke temere tempel temper temple tempre tepper terete terkel termer terpel terper terrel terrer terret terter tertre tetele tetete tetter treete trefet trefle trefte treker tremel tremet tremle trempe trepel treppe tretee trette