-er b-p bbb bbe bbp bbr bbt be- beb bee bep ber bet bpb bpe bpp bpr bpt brb bre brp brr brt btb bte btp btr btt ebb ebe ebp ebr ebt eeb eee eep eer eet ep- epb epe epp epr ept erb ere erp err ert etb ete etp etr ett p-p pbb pbe pbp pbr pbt peb pee pep per pet ppb ppe ppp ppr ppt prb pre prp prr prt pt- ptb pte ptp ptr ptt rbb rbe rbp rbr rbt re- reb ree rep rer ret rpb rpe rpp rpr rpt rrb rrp rrr rrt rtb rte rtp rtr rtt tbb tbe tbp tbr tbt te- teb tee tep ter tet tpb tpe tpp tpr tpt trb tre trp trr trt ttb tte ttp ttr ttt

bbbb bbeb bbet bbpr bebb bebe beeb beep beer beet bere berr bert bete bett breb bree brep brer bret brrr btbp btrt bttb ebbr eber eeee eete epee eper eppp eprb eprp epte erbb erbe ereb erer eret erpe erre etbr etee eter etre ette peep peer peet pepe per- pere perp perr pert pete petr pett pper pppp pptt pre- preb pree prep pret prtp prtr pter rbbb rbbr rebb rebe reeb reep reet repe repp repr rept rere rert rete retr rett rpet rrrr rtee rttp tbrb tbtp teer teet tepe tepp ter- tere terp terr tete tetr tett tper tppp tppr tpte tptp tptr tre- tree tret trpe trpp trte trtr ttbb tter tttt

-tree bbbee be-er beber beebe beete beppe berbe beret berre berte betee beter betre bett- bette breer breet brere brett brrrr btr-t ebber ebbet ebert eeeee eepee epptb erbbe erber erept erere erte erter etete etree etter p-rep pebre peere peert peete pepee peppe pept- perer peret perre perte petbe peter petr- petre pette prete pter- ptere ptprb ptpre ptprr ptprt rebbe reber rebet reepe reere repet reppe reprt rere- reree reret retee reter rette tbtbt teber tebet teepe tepee tepet teret terre tert- teter tetr- tette treer treet trepp trept trere trete trett ttttt

b-tree bbbbbb beebee beeper beeter berbee berber bereet berere berrer berret bertre betere betete bettee better breere brette ebbert eebree erbree errett pebete peepee peeper peerer peeter peetre pepper perere perper perpet perree perret perter pertre peteet petree petrer petter pettet pppppp preter pretre prette r-tree reeper repete repper reteer reteet retere retree retret retter t-tree teebee teepee teetee teeter tepper terete terper terrer terret terter tertre tetete tetter treete treppe tretee trette

bbbbbbb beetree berbere berrett bertree pee-pee peretre perrett prepere prepper prerept preter- reperte reteere reterre retrete rettert terere terreer terrere tettete treetee trepett trettre

bbbbbbbb bebetter beepbeep bepepper berebere berepper betterer etbetter peeppeep pepperer pepperet perpetre perrerer

beebeebee tebe-tebe

betterbeer pepperette peppertree peterpeter

pepper-tree

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