-er b-p bbb bbe bbn bbp bbr bbs bbt be- beb bee ben bep ber bes bet bnb bne bnn bnp bnr bns bnt bpb bpe bpn bpp bpr bps bpt brb bre brn brp brr brs brt bsb bse bsn bsp bsr bss bst btb bte btn btp btr bts btt ebb ebe ebn ebp ebr ebs ebt eeb eee een eep eer ees eet en- enb ene enn enp enr ens ent ep- epb epe epn epp epr eps ept erb ere ern erp err ers ert es- esb ese esn esp esr ess est etb ete etn etp etr ets ett nbb nbe nbn nbp nbr nbs nbt ne- neb nee nen nep ner nes net nnb nne nnn nnp nns nnt npb npe npn npp npr nps npt nrb nre nrn nrp nrr nrs nrt nsb nse nsn nsp nsr nss nst ntb nte ntn ntp ntr nts ntt p-p pbb pbe pbn pbp pbr pbs pbt peb pee pen pep per pes pet pn- pnb pne pnn pnp pnr pns pnt ppb ppe ppn ppp ppr pps ppt prb pre prn prp prr prs prt ps- psb pse psn psp psr pss pst pt- ptb pte ptn ptp ptr pts ptt rbb rbe rbn rbp rbr rbs rbt re- reb ree ren rep rer res ret rnb rnn rnp rnr rns rnt rpb rpe rpn rpp rpr rps rpt rrb rrn rrp rrr rrs rrt rsb rse rsn rsp rsr rss rst rtb rte rtn rtp rtr rts rtt sbb sbe sbn sbp sbr sbs sbt se- seb see sen sep ser ses set snb sne snn snp snr sns snt spb spe spn spp spr sps spt sr- srb sre srn srp srr srs srt ss- ssb sse ssn ssp ssr sss sst stb ste stn stp str sts stt tbb tbe tbn tbp tbr tbs tbt te- teb tee ten tep ter tes tet tnb tne tnn tnp tnr tns tnt tpb tpe tpn tpp tpr tps tpt trb tre trn trp trr trs trt tsb tse tsn tsp tsr tss tst ttb tte ttn ttp ttr tts ttt

-ene bbbb bbbs bbeb bbet bbpr bebb bebe beeb been beep beer bees beet bene benn bens bent bere bern berr bers bert bes- bese bess best bete bets bett bner bnet bnpp bnrr bnss breb bree bren brep brer bres bret brns brrr brrs brsb brsr brst bseb bsee bser bses bset bsns bspp bspr bsse bsts btbp bten btps btrt btss bttb ebbr ebbs eben eber ebes eeee eees eens eent eeps eers eese eete eets enb- enbn enbr enee ener enes enne enns enp- enrs ense enst ent- ente entp entr ents epee epen eper epes epns eppp epps eprb eprp eprs epsp epss epte erbb erbe ereb eren erer eres eret erne erns erpe erps erre errs erse erst erts esbs esee esen eser eses eset esne espe espn espp esps esse essp esst este estp estr ests etbr etee eten eter etes etne etnr etns etre ette ettn nber nbpp nbps nbsp nebb nebe nebn nebr nebs neeb neen neep neer nees neet nene nens nent nepe nepr neps nept nere nerr ners nert nesb nese nesn nesr ness nest net- netb nete nets nett nnes nnnn nnpr nnss nntn npes nprt npss npte nptn nren nrpn nrps nrsp nrts nseb nsep nser nsnr nsps nssb nsse nssp nssr nsss nstp nsts nter ntes ntsb ntss nttr pbrs pbsp peen peep peer pees peet pen- pene penn pens pent pepe peps per- pere pern perp perr pers pert pese pess pest pete petn petr pets pett pnes pnet pnpp pntr ppen pper pppn pppp ppps ppss pptn ppts pptt prbs pre- preb pree pren prep pres pret prnp prps prrs prse prss prtp prtr psbr psbt pseb psnr pspp pspr psps psrp psse psst psts pten pter rbbb rbbr rbbs rbsp rbss rbst rebb rebe rebs reeb reen reep rees reet rene renn rens rent repe repp repr reps rept rere rers rert rese resn resp ress rest rete retr rets rett rnbr rnnt rnsp rntp rpet rppn rpps rptn rpts rrrr rrsp rsee rsnn rsnr rspb rsps rsre rstp rsts rtee rtes rtns rtps rtss rttp rtts sbbs sber sbse sbsp sbst sbtn se-e se-n se-s se-t sebe sebs sebt seeb seen seep seer sees seet sene senn senr sens sent sepe sepn sepp sepr seps sept serb sere sern serp serr sers sert sese sess sest set- sete sets sett sneb snee snep sner snes snet snns snpp snrs snte sntr speb spee spen sper spes spet spne spns spps sprs spse spsp spss spst sptb sptr spts sreb sres srnn srps srpt srsp srtp srtr ssbn ssbr ssee ssep sses sset ssns sspe ssps sspt ssrs sssb ssss sstb sstp ssts stbs stee sten step ster stes stet stnn stnr stns stpp stps stre strn strs stss sttr tbbs tbrb tbsp tbst tbtp teen teer tees teet tenb tene tenn tenp tens tent tepe tepp ter- tere tern terp terr ters tese tesp tess test tete tetr tets tett tneb tnes tnsp tnts tper tppp tppr tprs tpte tptp tptr tre- tree tren tres tret trpe trpn trpp trps trst trte trtr tsen tses tset tspn tsps tspt tsse tssr tsst tsts ttbb tten tter ttss tttt

-tree bbbee bbser be-er beber bebes beebe beebs beene beens beeps beers beest beete beets bene- benet benne bense bents bepen beppe berbe beren beres beret berne berns bernt berre berse berte berts besee besen beset besne besse beste bests betee beten beter betes betne betre betrs bett- bette betts bpeen breen breer brees breet brene brenn brens brent brere brers brese bress brest brets brett brnes brrrr btens btr-t e-ten ebber ebbet ebene ebens ebern ebers ebert ebner ebsen eeeee eeens eener eenet eense eepee eeten enent enese enest enete enets ennes ennet enper enste enten enter entes entre entse epeen epees epene eppes epptb erbbe erben erber