bbbb bbeb bbet bbrc bbrg bcbc bcbg bccc bcec bcer bcet bctc bebb bebe beck beeb beeg beek beer beet begg beke berc bere berg berk berr bert betc bete bett brcb brce breb brec bree breg brek brer bret brkb brrr brtc btcc btec btek btrc btrt bttb cbbc cbcc cbce cbcr cbct cbec cbee cber cbet cbgb cbkg cbkr cbre cbrt cbtc ccbc cccb cccc ccee ccgc ccgt ccrc ccre ccrg ccrt cctb cctc cctt cec- cece cect ceeb ceec cege ceke cer- cerc cere cert cet- cete cgcc cgcg cger ckbc ckbe ckck cker ckrc cktb crbc crcc crce crcr cre- creb crec cree creg cret crkc crrt crtc ctec ctge ctrc ebbc ebbr ebcc eber ecbc ecbe eccb eccc ecce ecct ecrc ecrr ect- ectc eeee eeke eerc eerg eetc eete egbe egcc egcg egcr egec egee eger eggb egge egre egte egtk ekeb ekek eker eket erbb erbe ercc erce ereb erec erer eret erg- ergg erke errc erre etbc etbr etcc etec etee eter etre ette gc-c gcbc gccc gcet gcrg gctc gebe gece geck geek geer geet gege gegg gerb gere gert getb gete getg getk gett ggbt gggg grbr grcc grce greb grec gree greg gret grrr grtc gtbr gtcr kbbb kbbc kbbe kbbg kbbk kbbr kbbt kbcb kbce kbck kbcr kbct kbeb kbec kbee kbek kber kbet kbgb kbge kbgg kbgr kbgt kbkb kbkg kbkk kbkr kbrb kbrc kbre kbrg kbrk kbrt kbtb kbtc kbte kbtk kbtr kbtt kcbc kcbk kcbr kccb kccc kcck kccr kcct kceb kcec kcee kceg kcet kcgc kcgr kckc kckk kckr kcrc kcrg kcrr kcrt kctb kctc kcte kebb kebc kebe kebr kebt kecg keck kecr keek keer keet kege kegg kegk kegr kekb kekc keke ker- kerb kerc kere kerk kerr kert ket- ketc kete ketk ketr kett kgbb kgbc kgbr kgbt kgcb kgcc kgce kgcr kgeb kgec kget kggg kggr kgrb kgrc kgre kgrg kgrk kgrr kgrt kgtk kkbb kkbe kkbg kkbr kkbt kkcb kkck kkcr kkct kkeg kkgb kkgr kkkk kkrb kkrc kkre kkrk kkrr kkrt kktc kktk krbb krbe krbg krbk krbr krbt krcb krcc krce krcg kreb krec kree krek kret krgt krkc krke krkk krkr krrb krrc krre krrg krrk krrr krrt krtc krtk krtr ktbb ktbc ktbg ktbr ktbt ktcc ktce ktck ktcr ktec ktee kteg ktek ktge ktgg ktgr ktkb ktkc ktke ktkk ktkr ktkt ktrb ktrc ktre ktrg ktrk ktrr ktrt kttc kttg kttk kttr kttt rbbb rbbr rcbc rccb rccc rcet rcgc rcrg rctc rctg rebb rebe rebk recc rece reck recr rect reeb reek reet rege regr regt reke rekt rere rerg rert rete retr rett rgbe rgtr rrrr rtcc rtce rtcg rtee rtkg tbcb tbcc tbce tbrb tccc tctc teck tecr tect teec teek teer teet tegg tegt teke ter- terc tere terk terr tete tetr tett tgcc tgtc tkkg trcc tre- trec tree treg trek tret trge trtc trte trtr ttbb tter ttkg tttt