-er bbb bbe bbo bbr bbt be- beb bee beo ber bet bjj bjr bjt bob boe boj boo bor bot brb bre brj bro brr brt btb bte bto btr btt ebb ebe ebj ebo ebr ebt eeb eee eeo eer eet ejo ejt eo- eob eoe eoo eor eot erb ere ero err ert etb ete etj eto etr ett jbj jbo jbr jbt jeb jee jej jeo jer jet jjb jjj jjr job joe joj joo jor jot jrb jro jrr jrt jtb jte jtr jtt ob- obb obe obj obo obr obt oeb oee oeo oer oet ojb oje ojo oo- oob ooo oor oot or- orb ore oro orr ort ot- otb ote oto otr ott rbb rbe rbo rbr rbt re- reb ree reo rer ret rjr rob roe roj roo ror rot rrb rrr rrt rtb rte rtj rto rtr rtt tbb tbe tbj tbo tbr tbt te- teb tee tej teo ter tet tje tjo tjr to- tob toe toj too tor tot trb tre tro trr trt ttb tte tto ttr ttt

bbbb bbeb bbet bebb bebe bebo beeb beej beer beet beo- beor beot bere bero berr bert bete beto bett bobb bobe bobo boee boeo boer boet bojo bojt boob booe boor boot bor- bore borj boro borr bort botb bote boto bott breb bree breo brer bret brje brob broe broo bror brot brrr btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebro eeee eero eete ejer ejob ejoo ejot eore eoto erbb erbe ereb erer eret erob eroe eroo erre erro etbr etee eter etoe etre etro ette etto j-ro jbob jebb jebe jeer jeet jere jero jert jetb jete jett jobe jobo joee jojo joor joot jore joro jort joto jott jrbr o-eo obbo ober obet oboe obor obot obre obro oere oobe ooer oooo oore oort ootb orbb orbe orbo ore- oreb oreo orer oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto rbbb rbbr rebb rebe rebo reeb reet reot rere rero rert rete reto retr rett rob- robb robe robo robt roer roet roje rojo roob roor root rore roro rort rote rotj roto rotr rott rrrr rtee tbrb tebo teej teer teet tejo teor ter- tere terj tero terr tete teto tetr tett tobe tobo tobt toee toer toet tojo toor toot tore toro torr tort tote toto totr tott tre- tree treo tret troe troo trot trte trtr ttbb tteo tter ttoe tttt

-tree bbbee be-er be-ro beber bebot beebe beete bejte beote berbe beret berob beroe beror berre berte berto betee beter betoo betor betre bett- bette betto bo-bo bobet bobr bobre boero bojer booer boore boort borbo boree borer boret borje boro- boroo borot borre borro botet botro botte breer breet brejo breo- brere breto brett brobo broer broje broto brrrr btr-t ebber ebbet ebert eeeee eorre erbbe erber erere eroor erore eroto error erte erter etete etoro etree etter jebet jeroo jerre jerte jetee jeter jette jetto jobbe joe-e jooto joree jotto o-r-b obbet obejo obert obete objet oboro obote obreb oerje oo-er ooooo orbot oreo- orere orero orobe orobo oroer orret orter ortet ortoo otere otero ototo otter rebbe reber rebet reere rejto rere- reree reret rerob retee reter retje retro rette retto ro-ro robbe robbo rober robo- robor robot robrt robte roero rooer roore roote rorer roteb roter roto- rotor rotot rotte rotto rtejr tbtbt teber tebet teret terje teror terre terro tert- teter tetr- tetro tette tjore to-be tobbe tober tobet tobor tobot tobre toerr toeto toobe toore torbe toreo toret torje torob torre torro torte torto toter toto- totoe totoo totte treer treet trejo trere trete trett troee trott ttttt

b-tree bbbbbb bebeto beebee beeter berbee berbeo berber bereet berere berrer berret bertre betere betete bettee better bettor bjerre bjorbo bobber bobete bobote boeber boerre bojort boober booboo bootee booter borbor boreto borore bororo borte botere botero botete botoro botree botter breere brette broter brotto ebbert eebree eototo erbree eroto- errett etoeot ettore jebbet jeerer jeobet jettee jetter jobber joojoo jorjor jotter oberto obtree oerter oooooo ottoor r-tree reboot rebore rebote rerobe reroot reteer reteet reteoo retere retore retort retree retret retro- retrot retter robber robert roboto rooter rootte rorter rotter t-tree teebee teetee teeter terete terreo terrer terret terror terrot terter tertre tetete tetter tjejer tobeor toboot toejob toetoe tooter tootoo torero tororo torret tortor totebo totoro totrot totter trebor treete tretee trette trotro trotte

bbbbbbb beetree berbere berrett bertero bertree bo-tree bobotee boe-bot boo-boo boobjob borbore boretto borrero bottero eeeroer oberrot obterre orebro oroboro ottetto ottrott re-bore reteere reterre retrete rettert rettore roberto robobee rootrot rotebro terere tereto- terreer terrere tettete tjotter to-bote toe-toe too-too torbert torrert tototoo treboje treetee trettre tro-tro trottee trotter

bbbbbbbb bebetter beetroot berebere betterer betteror betterto bo-bo-bo boortree boottree boretree brebotte etbetter jeobette jo-jotte job-trot joetorre retorter retrojet robertet robertot roboteer rootbeer teetoter toetotoe toottoot torotoro totterer treeroot

beebeebee beet-root boor-tree boot-tree borborbor joejetter retrotort robotbeer rotrooter tebe-tebe teterboro tortoreto

betterbeer rotorooter toe-to-toe

roto-rooter

teetertotter

teeter-totter tetter-totter

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