-er bbb bbe bbi bbm bbr bbt be- beb bee bei bem ber bet bi- bib bie bii bim bir bit bmb bme bmi bmm bmr bmt brb bre bri brm brr brt btb bte bti btm btr btt ebb ebe ebi ebm ebr ebt eeb eee eem eer eet eib eie eii eim eir eit em- emb eme emi emm emr emt erb ere eri erm err ert etb ete eti etm etr ett ibb ibe ibi ibm ibr ibt ie- iee iei iem ier iet iib iie iii iim iir iit im- imb ime imi imm imt ir- irb ire iri irm irr irt itb ite iti itm itt m-r mbb mbe mbi mbm mbr mbt meb mee mei mem mer met mi- mib mie mii mim mir mit mmb mme mmi mmm mmr mmt mrb mre mri mrm mrr mrt mtb mte mti mtm mtr mtt rbb rbe rbi rbm rbr rbt re- reb ree rei rem rer ret rib rie rii rim rir rit rmb rme rmi rmm rmr rmt rrb rri rrm rrr rrt rtb rte rti rtm rtr rtt tbb tbe tbi tbm tbr tbt te- teb tee tei tem ter tet tib tie tii tim tir tit tmb tme tmi tmm tmr tmt trb tre tri trm trr trt ttb tte tti ttm ttr ttt

bbbb bbeb bbet bebb bebe bebi beeb beem beer beet beim beir beit beme bere beri berm berr bert bete beti bett bibb bibe bibi bieb bier biet birb bire biri birr birt bite bitt bmir bmmi breb bree brei brem brer bret brie brim brit brrm brrr btie btrt bttb ebbr eber ebit eeee eete eiei eier eime eimi eire eitb eiti eitm eitr embe embi embr emer emet emii emim emir emit emme emmi emre emte erbb erbe ereb erei erem erer eret erie erim erit erme erre etbr etee etem eter etim etre etrm ette etti i-be ibbm ibet ibie ibim ibri ibtb ieet ieie ieme iere ieri ietm iett iiie iiii iiit iitm iitr iitt imbe imbi imer imet imir imit imme immi immt imre imri imrr irbe irbm iree irem irer iri- irie irre irri irte irti itbe item iter itet itie itim itme itri mbim mebe meem meer meet meir meit meme memr mer- merb mere meri merm mert met- mete meti mett miee miem mier miet miii miit mim- mime mimi mire miri mirr mirt mit- mitb mite miti mitm mitt mmii mmmm mrbb mrbm mreb mree mrtm mrtt mtre mtrr mttr rbbb rbbr rebb rebe reeb reem reet reii reim reir reit reme remi rere reri rert rete reti retr rett rib- ribe riem rier riet rime rimi rimm rire riri rite riti ritt rrrr rtee rtei rtmi tbit tbrb teem teer teet teie teim teir teme ter- tere teri term terr tete teti tetr tett tibi tie- tiee tiei tier tiet tiit time timi timm tirb tire tiri tirr tite titi titt tmbr tmtt tre- tree trei trem tret tri- trib trie trim trit trmb trmi trte trtr ttbb tter ttim tttt

-tree bbbee be-er beber bebti beebe beeri beete beibi beier beire beite bembe bemer bemet berbe berei beret berie berim berit berme berre berri berte berti betee beter betie betim betre bett- bette betti bibbe biber bibie bibri biebe biere bieri biert bieti birie birme birmi biter bitit bitte bitti bmiii breem breer breet breim breit breme bremm brere brett bribe brier brime brimm brite britt brmmm brrrr btr-t ebber ebbet ebbie ebert ebibe eeeee eerie eetti eirie eiter eitri embee ember emeer emere emeri emert emiri emite emmer emmet emmie emtee erbbe erber erem- erere erier erimi erite ermir ermit erte erter etete etite etree etter ettie i-bet i-m-r ibert ibeti ibmer iebet ieiri ierei iette iiiee iiiii iitti imber imeem imeet immer immie immit imrie irbit irete irime irimi irite irrit itbit itete itire itmbe itter ittre ittti mbebe mbere mbiri mbret mebbe mebi- meere meeri meete meier meire meiri meite membe memer merei merer meret meri- merie merir merit merre merri merte merti meter metir metr- metre metri mette metti mi-mi mibre mimee mimer mimet mimir mimmi mirer miret mirie mirim mirre mirri mirti miter mitie mitim mitre mitte mitti mmiii mmmmm mrmet mt-te mt-ti mt-tm mt-tr mt-tt mtree rebbe reber rebet rebit reeme reere reeti reime remee remer remet remi- remit rere- reree reret rerir retee retem reter retie rette ribbi riber ribet ribie rieti rimer rimmi ririe tbeti tbtbt teber tebet tebi- teeme tembe tembi temir temri terem teret terme terre terri tert- teter tetr- tetri tette ti-ti tibbi tiber tibet tieit tieme tiere tieri timbe timei timer timet timit tiree tirer tiret tirit titer titii titre titte titti treer treet treib treie treit treme trere treri trete trett tri-m tribe trieb triei trier triet trime trit- trite tritt ttime ttttt

b-tree bbbbbb bebite beebee beebem beembe beemer beerme beeter beiber beimir bemeet bemete bemire berbee berber bereet berere berime bermet berrer berret berrie bertem bertie bertre beteem betere betete betime betire betrim bettee better bettie bibber bibemi bibiri bieber bimber bimmer bireme biribi biteit biteme bitier bitime bitter bittie breere breite bremer bremit brette bribe- bribee briber bribir bribri brimer brimir brimme ebbert ebr-ii ebrie eebree eerier eibert embibe embree emeere emerit emeter emiter emmert emmett emmitt erbree erebti erimbm erimem ermite errett i-bere i-bete i-tree imberb imbert imbibe imbrie imiere imirim immert immire irrite itbeme ittiri m-tree mbembe mbieri meemie meeter meetit meetme meetre meirre meitei member membre mememe memere mereit merete merire meritt mermer mermet merrem merret merrie merrit merter mertim meteer meteti metier metime metire metrer metter mettet mibbit mierie mimmer mirier miriti mirrer mitier mitrit mitter mittet mtiebi r-tree re-mit rebbit rebite reemit reiber reimei reimer reiter remeet remete remeti remire reteer reteet retere reterm retime retire retree retret retrim retter ribber ribbet ribbie ribbit ribibe ribier rieber rieter riette rietti rimier rimmer rititi ritter t-tree tebbit teebee teemer teerme teetee teeter teirei tembre temere terete teribe