bbbb bbci bbeb bbet bbfc bbrc bcbc bccc bcci bcec bcer bcet bcfc bcie bcit bctc bebb bebe bebi beci beck beeb beef beek beer beet befe beff beft beic beik beir beit beke beki berc bere beri berk berr bert betc bete beti bett bftt bibb bibe bibi bicc bice bici bick bieb bief bier biet biff bifi bike birb bire biri birk birr birt bitc bite bitt brcb brce breb brec bree bref brei brek brer bret brfc bric brie brik brit brkb brrr brtc btcc btec btek btfc btie btrc btrt bttb cbbc cbcc cbce cbcr cbct cbec cbee cbef cber cbet cbfb cbfc cbir cbit cbkr cbre cbrt cbtc cbtf ccbc cccb cccc cccf ccci ccee ccfc ccff ccfi ccic ccii ccir ccrc ccre ccrf ccri ccrt cctb cctc cctt cec- cece ceci cect ceeb ceec cef- cefc ceke cer- cerc cere cerf ceri cert cet- cete ceti cfbc cfbr cfbt cfcb cfcf cffb cffr cfit cfrb cfre cfrt cftc cfte cftk cftr cibc cibe cibi cicc cici cicr cict ciee cier cife ciff ciii ciit cikr cirb circ cire ciri cirk cirr cirt citb cite citf citi citt ckbc ckbe ckbi ckck cker ckfi ckfr ckrc cktb crbc crcc crce crcr cre- creb crec cree crei cret crfc crib cric crie crif crik crit crkc crrt crtc crtf ctbi ctcf ctec ctfc ctic ctrc ebbc ebbr ebcc eber ebfc ebic ebit ecbc ecbe eccb eccc ecce ecci ecct ecef ecfc ecfr ecib ecit ecrc ecrf ecri ecrr ect- ectc ectf eeee eefe eeke eerc eetc eete efbr efet effi efic efik efit efke eft- eick eiec eiei eier eike eiki eire eitb eitc eiti eitr ekeb ekek eker eket ekfc ekki erbb erbe ercc erce ereb erec erei erer eret erfc erft eric erie erik erit erke erki errc erre etbc etbr etcc etec etee eter etfb etfc etfe etic etik etre ette etti f--k fccf fcic fcii fece feck fect feeb feek feer feet fefc fefe feff fefi feie feir feit feke ferb ferc fere ferk ferr fert fete feti fetr fett ffcc ffee ffff ffii ffrr fftf fibe ficc fice fick fict fiec fief fier fifc fife fiff fifi fift fiii fike fiki fire firk fitc fite fiti fitt frbc frcc free frei fret frfc frib fric frie frik frit ft-c fter ftfc ftii i-be ibec ibet ibfi ibie ibrc ibri ibtb ibtc icbc iccb iccc iccf icci iccr icct icec icee icef icer icet icfb icke icrc icre icrf icrr icrt iecc ieet ieie iere ieri ietf iett ifbb ifer ific ifit ifrb ifrf ifri iiie iiii iiit iirc iitr iitt ikee iker ikki ikri irbe ircc iree irer irfe iri- iric irie irki irrc irre irri irte irtf irti itbe itec itek iter itet itic itie itif itrf itri ittf k-ci kbbb kbbc kbbe kbbf kbbi kbbk kbbr kbbt kbcb kbce kbci kbck kbcr kbct kbeb kbec kbee kbef kbek kber kbet kbfb kbfc kbff kbfi kbfk kbfr kbft kbib kbic kbie kbif kbik kbit kbkb kbkf kbkk kbkr kbrb kbrc kbre kbrf kbri kbrk kbrt kbtb kbtc kbte kbtf kbtk kbtr kbtt kcbc kcbf kcbi kcbk kcbr kccb kccc kcci kcck kccr kcct kceb kcec kcee kcei kcet kcfb kcfc kcfi kcft kcic kcie kcif kcii kcir kcit kckc kckf kckk kckr kcrc kcri kcrr kcrt kctb kctc kcte kcti kebb kebc kebe kebi kebr kebt keck kecr keef keek keer keet kefb kefc keff kefr keft keib keif keii keik keir kekb kekc keke keki ker- kerb kerc kere kerf keri kerk kerr kert ket- ketc kete ketf keti ketk ketr kett kfbc kfbk kfbt kfcf kfcr kfeb kfer kffb kfff kffk kfir kfit kfkb kfrc kfre kfri kfrr kftc kfte kfti kftk kftt kibb kibc kibe kibi kibr kibt kicb kicc kice kick kicr kict kief kier kife kiff kifr kift kiic kiii kiik kiit kikc kikf kiki kikk kikr kikt kirb kirc kirf kiri kirk kirr kirt kitc kite kiti kitr kitt kkbb kkbe kkbi kkbr kkbt kkcb kkci kkck kkcr kkct kkfi kkfr kkft kkic kkik kkit kkkk kkrb kkrc kkre kkrf kkrk kkrr kkrt kktc kktk krbb krbe krbi krbk krbr krbt krcb krcc krce krci kreb krec kree kref krei krek kret krfc krfe krff krft krib krik krit krkc krke krki krkk krkr krrb krrc krre krrf krri krrk krrr krrt krtc krti krtk krtr ktbb ktbc ktbr ktbt ktcc ktce ktck ktcr ktec ktee ktek ktfb ktfc ktfi ktib ktic ktie ktik ktkb ktkc ktke ktkk ktkr ktkt ktrb ktrc ktre ktrf ktri ktrk ktrr ktrt kttc kttf ktti kttk kttr kttt rbbb rbbr rcbc rccb rccc rcet rcfc rcic rctc rcti rebb rebe rebk recc rece reci reck recr rect reeb reef reek reet refe reff refi refr reft reif reii reik reir reit reke reki rekt rere reri rert rete reti retr rett rfef rffc rfic rftc rib- ribe ricc rice rick rict rief riek rier riet rife riff rift riif rike riki rikk rire riri rite riti ritt rkkf rrfc rrif rrrr rtbf rtcc rtce rtee rtei rtfb rtfc tbcb tbcc tbce tbit tbrb tccc tcfc tctc teck tecr tect teec teef teek teer teet tefc teff tefi teft teic teie teir teke ter- terc tere terf teri terk terr tete teti tetr tett tfeb tfec tftc tibi ticc tice tick tie- tiee tief tiei tier tiet tiff tift tiit tike tiki tirb tire tiri tirr titc tite titi titt trcc tre- trec tree tref trei trek tret trfc trfr tri- trib tric trie trif trik trit trtc trte trtr ttbb tter ttfc ttff tttt