-tree bbbee bbser be-er beber bebes beebe beebs beers beest beete beets bembe bemer bemet berbe beres beret berme berms berre berse berte berts besee besem beset besme besse beste bests betee beter betes betre betrs bett- bette betts bmrst breem breer brees breet breme bremm brems brere brers brese bress brest brets brett brmmm brrrr btr-t bttms ebber ebbet ebers ebert eeeee embee ember emeer emere emert emese emmer emmet emtee erbbe erber erebs erem- erere erest erets ermes erres erses erste ersts erte erter ertes esere esmes esser esses essse estee ester estes estet estre etest etete etree etres etter ettes m-set mbebe mbere mbres mbret mebbe meees meems meere meers meese meest meete meets membe memer memes merer meres meret merms merre merse merss merte mesee mesem meses messe meste meter metes metr- metre metse mette metts mmmmm mrmet mt-te mt-tm mt-tr mt-tt mtree rebbe reber rebet rebts reeme reere reese reest remee remer remet remse rere- reree reres reret resee reses reset resse reste restr rests retee retem reter retes rette retts rtems sebbe sebes sebet seebe seeem seeme seems seere seers seese seest seete semee semes semet semme serbs serer seres seret serme serre serse serss sert- serte serts seser seses sesse seste setee setem seter setme setse sette setts smees smeet smere smert smets sssrb sssss steem steer stees steet stemm stems stere sterr sters stert stete stets strbe streb stree strem stret strrs strsm tbtbt teber tebet teebs teeme teems teers teese teest teets tembe temes temse terem teres teret terme terms terre terrs terse tert- tesem tesse teste tests teter tetes tetr- tette treer trees treet treme trere tres- trese tress trest trete trets trett tsebe tsere tsets tsmmr ttest ttttt