-er bbb bbe bbo bbr bbs bbt be- beb bee beo ber bes bet bob boe boo bor bos bot brb bre bro brr brs brt bsb bse bso bsr bss bst btb bte bto btr bts btt ebb ebe ebo ebr ebs ebt eeb eee eeo eer ees eet eo- eob eoe eoo eor eos eot erb ere ero err ers ert es- esb ese eso esr ess est etb ete eto etr ets ett ob- obb obe obo obr obs obt oeb oee oeo oer oes oet oo- oob ooo oor oos oot or- orb ore oro orr ors ort os- osb ose oso osr oss ost ot- otb ote oto otr ots ott rbb rbe rbo rbr rbs rbt re- reb ree reo rer res ret rob roe roo ror ros rot rrb rrr rrs rrt rsb rse rso rsr rss rst rtb rte rto rtr rts rtt sbb sbe sbo sbr sbs sbt se- seb see seo ser ses set sob soe soo sor sos sot sr- srb sre sro srr srs srt ss- ssb sse sso ssr sss sst stb ste sto str sts stt tbb tbe tbo tbr tbs tbt te- teb tee teo ter tes tet to- tob toe too tor tos tot trb tre tro trr trs trt tsb tse tso tsr tss tst ttb tte tto ttr tts ttt

-ose bbbb bbbs bbeb bbet bebb bebe bebo beeb beer bees beet beo- beor beos beot bere bero berr bers bert bes- bese beso bess best bete beto bets bett bobb bobe bobo bobs boee boeo boer boes boet boob booe boor boos boot bor- bore boro borr bors bort bose boso boss bost botb bote boto bots bott breb bree breo brer bres bret brob broe broo bror bros brot brrr brrs brsb brsr brst bseb bsee bser bses bset bsos bsse bsts btob btor btrt btss bttb ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebro eeee eees eero eers eese eete eets eoes eore eost eoto eots erbb erbe ereb erer eres eret erob eroe eroo eros erre erro errs erse erso erst erts esbo esbs esee eseo eser eses eset eso- esos esse esso esst este esto estr ests etbr etee eter etes etoe etos etre etro ette etto o-eo obbo ober obes obet oboe obor obos obot obre obro obsr obss obst obts oere oers oese oest oobe ooer ooes oooo ooos oore oort oose oost ootb oots orbb orbe orbo orbs ore- oreb oreo orer ores oro- oroe oror oros orot orro orrs orse orso orte orto orts osbe osee oser oses oset osoo osor osos osro ossb osse osso oste ostr osts otbs otee oter otes oto- otoe otoo otor otos otre otro otrs otse otso otte otto otts rbbb rbbr rbbs rbss rbst rebb rebe rebo rebs reeb rees reet reos reot rere rero rers rert rese reso ress rest rete reto retr rets rett rob- robb robe robo robs robt roer roes roet roob roor roos root rore roro rort rose roso ross rost rote roto rotr rots rott rrrr rsee rsos rsre rsts rtee rtes rtss rtts s-os sbbs sber sbor sbot sbse sbst se-e se-o se-s se-t sebe sebo sebs sebt seeb seer sees seet serb sere sero serr sers sert sese seso sess sest set- sete seto sets sett sobe sobo sobr sobs sobt soeo soes soor soos soot sorb sore soro sorr sors sort sose soso soss sost sote soto sots sreb sreo sres sros srtr ssbr ssee sses sset ssot ssrs sssb ssss sstb ssts stbs stee steo ster stes stet stob stoe stoo stor stos stot stre stro strs stss sttr tbbs tbrb tbst tebo teer tees teet teor teos ter- tere tero terr ters tese teso tess test tete teto tetr tets tett tobe tobo tobs tobt toee toer toes toet toor toos toot tore toro torr tors tort tosb tose toso toss tost tote toto totr tots tott tre- tree treo tres tret troe troo tros trot trst trte trtr tses tset tsob tsos tsse tssr tsst tsts ttbb tteo tter ttoe ttss tttt

-tree bbbee bbser be-er be-ro beber bebes bebot beebe beebs beers beest beete beets beost beote berbe beres beret berob beroe beror berre berse berte berto berts besee beset besob besos besot besse besso beste bests betee beter betes betoo betor betre betrs betso bett- bette betto betts bo-bo bobet bobos bobr bobre bobst bobts boero boers boese boets boobs booer boore boors boort boose boost boots borbo boree borer bores boret boro- boroo boros borot borre borro borse borst borts boset bosor bosse bosso boste botes botet botos botro botte botts breer brees breet breo- brere brers brese bress brest breto brets brett brobo brobs broer broos brose bross broto brrrr btr-t ebber ebbet ebers ebert eboes eeeee eeros eorre eoste erbbe erber erebs erere erest erets eroes eroor eroos erore erose eross eroto erres error erses erste ersts erte erter ertes esere esser esses essor essse estee ester estes estet estos estre estro etest etete etoro etree etres etter ettes o-r-b obbet obers obert obese obeso obess obete oboes oboro obote obreb obrse obste oeses oeste oo-er ooooo ooser ooste orbot oreo- oreos orere orero orest orobe orobo oroer orose oroso orost orret orser orses orter ortes ortet ortoo osebo osete ososo osse- osseo osser osset ossos oste- osteo oster ostre ostro otere otero otoes otose otoso ototo otros otste otter ottos rebbe reber rebet rebts reere reese reest reose rere- reree reres reret rerob resee reses reset resor resse reste resto restr rests retee reter retes retro rette retto retts ro-ro robbe robbo robbs rober robes robo- robor robot robrt robte roero roers roest rooer roore roose roost roote roots rorer rorts rosee roseo roser roses roset rosse rosso rosss roste rosto rosts roteb roter rotes roto- rotor rotos rotot rotse rotte rotto s-bot s-o-r sebbe sebes sebet sebo- seebe seeor seere seers seese seeso seest seete