-er bbb bbc bbe bbk bbm bbr bbt bcb bcc bce bck bcm bcr bct be- beb bec bee bek bem ber bet bkb bkc bke bkk bkm bkr bkt bmb bmc bme bmk bmm bmr bmt brb bre brk brm brr brt btb btc bte btk btm btr btt c-- cbb cbc cbe cbk cbm cbr cbt ccb ccc cce cck ccm ccr cct ce- ceb cec cee cek cem cer cet ckb ckc ckm ckt cmb cmc cme cmk cmm cmr cmt crb crc cre crk crm crr crt ctb ctc cte ctk ctm ctr ctt ebb ebc ebe ebk ebm ebr ebt ec- ecb ecc ece eck ecm ecr ect eeb eec eee eek eem eer eet ekb ekc eke ekr ekt em- emb emc eme emk emm emr emt erb erc ere erk erm err ert etb etc ete etk etm etr ett k-t kbb kbc kbe kbk kbm kbr kcb kcc kce kck kcm kcr kct ke- keb kec kee kek kem ker ket kkb kkc kke kkk kkm kkr kkt kmb kmc kme kmk kmm kmt krc krk krr krt ktb ktc kte ktk ktm ktr ktt m-r mbb mbc mbe mbk mbm mbr mbt mc- mcb mcc mce mck mcm mcr mct meb mec mee mek mem mer met mkb mkc mke mkk mkm mkr mkt mmb mmc mme mmk mmm mmr mmt mrb mrc mre mrk mrm mrr mrt mtb mtc mte mtk mtm mtr mtt rbb rbc rbe rbk rbm rbr rbt rcb rcc rce rcm rcr rct re- reb rec ree rek rem rer ret rkb rkc rke rkk rkm rkt rmb rmc rme rmm rmr rmt rrb rrc rrk rrm rrr rrt rtb rtc rte rtk rtm rtr rtt tbb tbc tbe tbk tbm tbr tbt tcb tcc tce tck tcm tcr tct te- teb tec tee tek tem ter tet tkb tkc tke tkk tkm tkr tkt tmb tmc tme tmk tmm tmr tmt trb trc tre trk trm trr trt ttb ttc tte ttk ttm ttr ttt

bbbb bbcm bbeb bbet bbrc bcbc bccc bccm bcec bcer bcet bctc bebb bebe beck beeb beek beem beer beet beke beme berc bere berk berm berr bert betc bete bett bmce bmtc brcb brce breb brec bree brek brem brer bret brkb brmc brrm brrr brtc btcc btec btek btrc btrt bttb cbbc cbcc cbce cbcm cbcr cbct cbec cbee cber cbet cbkm cbkr cbme cbre cbrm cbrt cbtc ccbc cccb cccc cccm ccee cckm ccmb ccmc ccmm ccrc ccre ccrt cctb cctc cctt cec- cece cecm cect ceeb ceec ceem ceke cemb ceme cemm cemr cer- cerc cere cert cet- cete ckbc ckbe ckck ckcm ckem cker ckrc ckrm cktb cmbc cmcc cmec cmmb cmmc cmrr cmtc crbc crcc crce crcr cre- creb crec cree crem cret crkc crmb crrt crtc crtm ctec ctrc ctrm ebbc ebbr ebcc eber ecbc ecbe eccb eccc ecce eccm ecct ecem ecrc ecrm ecrr ect- ectc eeee eeke eerc eetc eete ekeb ekek eker eket embe embr emcc emek emer emet emme emre emte erbb erbe ercc erce ereb erec erem erer eret erke ermc erme errc erre etbc etbr etcc etec etee etem eter etre etrm ette kbbb kbbc kbbe kbbk kbbm kbbr kbbt kbcb kbce kbck kbcr kbct kbeb kbec kbee kbek kber kbet kbkb kbkk kbkr kbmb kbmc kbme kbmr kbmt kbrb kbrc kbre kbrk kbrt kbtb kbtc kbte kbtk kbtm kbtr kbtt kcbc kcbk kcbr kccb kccc kcck kccr kcct kceb kcec kcee kcet kckc kckk kckm kckr kcmb kcmc kcme kcmk kcmm kcmr kcmt kcrc kcrr kcrt kctb kctc kcte kebb kebc kebe kebr kebt keck kecr keek keem keer keet kekb kekc keke kemb kemc keme kemm kemr ker- kerb kerc kere kerk kerm kerr kert ket- ketc kete ketk ketr kett kkbb kkbe kkbr kkbt kkcb kkck kkcm kkcr kkct kkkk kkmc kkmk kkmr kkmt kkrb kkrc kkre kkrk kkrr kkrt kktc kktk kmbc kmbr kmcb kmcc kmce kmcm kmcr kmem kmer kmet kmke kmkk kmkt kmme kmmk kmmm kmmr kmmt kmrb kmrc kmrr kmtb kmtc kmtk kmtr kmtt krbb krbe krbk krbm krbr krbt krcb krcc krce krcm kreb krec kree krek krem kret krkc krke krkk krkr krmb krmc krme krmr krmt krrb krrc krre krrk krrm krrr krrt krtc krtk krtm krtr ktbb ktbc ktbr ktbt ktcc ktce ktck ktcm ktcr ktec ktee ktek ktem ktkb ktkc ktke ktkk ktkr ktkt ktmb ktmc ktme ktmk ktmm ktmr ktmt ktrb ktrc ktre ktrk ktrm ktrr ktrt kttc kttk kttr kttt mcbc mccc mckk mcmc mcmt mcrc mctc mctk mebe mec- mecc mece meck mecr meek meem meer meet meke memc meme memr mer- merb merc mere merk merm mert met- mete mett mker mmcc mmcm mmct mmmc mmmm mmrc mr-c mrbb mrbm mrcb mrcc mrce mreb mree mrkr mrmc mrrc mrtm mrtt mtbc mtcr mtrc mtre mtrr mttr rbbb rbbr rbmk rcbc rccb rccc rcet rctc rebb rebe rebk recc rece reck recm recr rect reeb reek reem reet reke rekt reme rere rert rete retr rett rrkm rrmc rrrr rtcc rtce rtcm rtee rtmc tbcb tbcc tbce tbrb tccc tctc teck tecr tect teec teek teem teer teet teke teme ter- terc tere terk term terr tete tetr tett tmbc tmbr tmcc tmcm tmmk tmtt trcc tre- trec tree trek trem tret trmb trmk trtc trte trtr ttbb tter tttt

-tree b-r-k bbbee be-er bebek beber becke beebe beeke beete beker bekke bembe bemer bemet berbe berck berec berek beret berk- berke berme berre berte betee beter betke betre bett- bette brece breck breek breem breer breet breke breme bremm brere brett brmmm brrrr btc-e btr-t c-met c-tec ccccc ccett cebec ceber ceere cemec cemre cerc- cerce cerec cerer ceret cerke cerre certe cetme cette cmere crebe crece creek creem creer creke creme crete ctree cttee ebber ebbet ebert ecker eecke eeeee eembc eemct ekker ekmek ekrem embee ember emcee emeer emere emerk emert emmer emmet emtec emtee emtek erbbe erber erect