-tree eeeee eeler efere efetf effer effet eftel efter ekker eleet elele ellek ellel eller ellet eltek erere erkel erte ertel erter eteke etete etree etrek ettel etter ettle feele feere felet felle felte feltt ferel feret ferle ferr- ferre ferte fetel feter fette fleek fleer fleet fleke flere flerk flert flete flett freek freel freer freet freke frere frett ftlee ftrtt k-tel keefe keele keere kefee kelek kelle kerek kerel keret kerle kerre ketek ketel keter kette kleet klefe klerk klett kreef kreek kreel kreke krele krell krete leeke leell leere leert leffe lekel lelle lerer letek letre lette reefe reeft reere refel refer refet reffe rekel rekke rekle relee relek relet relte rere- reree reret retee retel reter rette rt-rk teele teell tefe tekel teket tekke tele- telek teler tell- telle terek teret terre tert- tetel teter tetle tetr- tette tlell tlett treer treet trefe treff trele trere trete trett ttttt