-er bbb bbe bbm bbo bbr bbt be- beb bee bem beo ber bet bmb bme bmm bmo bmr bmt bob boe bom boo bor bot brb bre brm bro brr brt btb bte btm bto btr btt ebb ebe ebm ebo ebr ebt eeb eee eem eeo eer eet em- emb eme emm emo emr emt eo- eob eoe eom eoo eor eot erb ere erm ero err ert etb ete etm eto etr ett m-o m-r mbb mbe mbm mbo mbr mbt meb mee mem meo mer met mmb mme mmm mmo mmr mmt mob moe mom moo mor mot mrb mre mrm mro mrr mrt mtb mte mtm mto mtr mtt ob- obb obe obm obo obr obt oeb oee oem oeo oer oet om- omb ome omm omo omr omt oo- oob oom ooo oor oot or- orb ore orm oro orr ort ot- otb ote otm oto otr ott rbb rbe rbm rbo rbr rbt re- reb ree rem reo rer ret rmb rme rmm rmo rmr rmt rob roe rom roo ror rot rrb rrm rrr rrt rtb rte rtm rto rtr rtt tbb tbe tbm tbo tbr tbt te- teb tee tem teo ter tet tmb tme tmm tmo tmr tmt to- tob toe tom too tor tot trb tre trm tro trr trt ttb tte ttm tto ttr ttt

bbbb bbeb bbet bebb bebe bebo beeb beem beer beet beme beo- beor beot bere berm bero berr bert bete beto bett bobb bobe bobo boee boeo boer boet bomb bome bomt boob booe boom boor boot bor- bore borm boro borr bort botb bote boto bott breb bree brem breo brer bret brob broe brom broo bror brot brrm brrr btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebro eeee eemo eero eete embe embo embr emer emet emme emor emre emte eore eoto erbb erbe ereb erem erer eret erme ermo erob eroe eroo erre erro etbr etee etem eter etoe etre etrm etro ette etto mebe mebo meem meer meet meme memo memr meor mer- merb mere merm mero mert met- mete meto mett mmmm mmor mobb mobe mobo moet mome momo moob mooe moor moot morb more moro mort motb mote motm moto mott mrbb mrbm mreb mree mrtm mrtt mtbo mtoe mtom mtor mtre mtrr mttr o-eo obbo ober obet oboe obor obot obre obro oeme oere oerm ombe ombo omee omeo omer omet omo- omoe omoo omor omre omro oobe ooer oome oooo oore oort ootb orbb orbe orbo ore- oreb orem oreo orer orme ormo oro- oroe orom oror orot orro orte orto otee otem oter oto- otoe otoo otor otre otro otte otto rbbb rbbr rebb rebe rebo reeb reem reet reme remo reot rere rero rert rete reto retr rett rob- robb robe robo robt roer roet romb rome romm romo roob room roor root rore roro rort rote roto rotr rott rrrr rtee t-mo tbrb tebo teem teer teet teme temo teom teor ter- tere term tero terr tete teto tetr tett tmbr tmro tmtt tobe tobo tobt toee toer toet tomb tome tomm tomo tomt toom toor toot tore torm toro torr tort tote totm toto totr tott tre- tree trem treo tret trmb troe trom troo trot trte trtr ttbb tteo tter ttoe tttt

-tree bbbee be-er be-ro beber bebot beebe beete bembe bembo bemer bemet beote berbe beret berme bermo berob beroe berom beror berre berte berto betee beter betoo betor betre bett- bette betto bo-bo bobet bobr bobre boeme boero bombe bombo bomer bomet bomme booer boomb boore boort borbo boree borer boret bormo boro- borom boroo borot borre borro botet botme botom botro botte breem breer breet breme bremm bremo breo- brere breto brett brmmm brobo broer brom- brome bromo broom broto brrrr btr-t ebber ebbet ebert eeeee embee ember embro emeer emere emert emmer emmet emore emote emoto emtee eomer eorre erbbe erber erem- eremo erere erome eroom eroor erore eroto error erte erter etete etoro etree etter mbebe mbere mboro mbret mebbe meebo meere meete membe memer memor merer meret mero- meroe merom meroo meror merre merte meteo meter metoo metr- metre metro mette mmmmm mobee mobme mobor mobot mobro moeer moeme moere moero mombo momme momoe momot mooer moore mooro moote mooto morbo moree morem morer moret mormo moror morre morro morte moter motet moto- motor motre motte motto mrmet mrmom mrorr mt-te mt-tm mt-tr mt-tt mtoto mtree o-r-b obbet obert obete oboro obote obreb obrom oerme ombe- omber ombre omemo omero omore omoro omoto oo-er ooooo orbom orbot oreo- orere orero ormer ormet orobe orobo oroer orome oromo orret orter ortet ortoo otere otero otmer otome otomo ototo otter ottom rebbe reber rebet reeme reemo reere remee remer remet remor reome rere- reree reret rerob retee retem reter retro rette retto ro-ro robbe robbo rober robo- robor robot robrt robte roero rombe romeo romer romme rooer roome roore roote rorem rorer roteb rotem roter roto- rotor rotot rotte rotto tbtbt teber tebet teeme tembe tembo temoe teome terem teret terme termo teror terre terro tert- teter tetr- tetro tette to-be tobbe tober tobet tobor tobot tobre toerr toeto tombe tombo tomer tomme tommo tomo- tomoe tomom tomor tomte toobe toome toore torbe toreo toret torme torob torre torro torte torto totem toter toto- totoe totoo totte treer treet treme trere trete trett troee trome tromm trott ttttt

b-room b-tree bbbbbb bebeto beebee beebem beembe beemer beerme beeter bemeet bemete berbee berbeo berber bereet berere bermeo bermet berrer berret bertem bertre beteem betere betete bettee better bettor bobber bobete bobote boeber boerre bomber bombom bommer boober booboo boom-o boomer bootee booter borbor boreto boromo borore bororo borte botere botero botete botoro botree botter bottom breere brembo bremer brette bromme bromo- broome broter brotto ebbert eebree embree emeere emeter emmert emmett emmott emoter eototo erbree eremo- eroto- errett etoeot ettore m-tree mbembe mbombe mbombo me-too meeter meetme meetre meetro member membre mememe memere memome