bbbb bbci bbeb bbrc bbrg bcbc bcbg bccc bcci bcec bcer bcie bebb bebe bebi beci beck beeb beeg beek beer begg begi beic beik beir beke beki berc bere berg beri berk berr bibb bibe bibi bicc bice bicg bici bick bieb bier bigb bigc bige bigg bike birb bire birg biri birk birr brcb brce breb brec bree breg brei brek brer bric brie brig brik brkb brrr cbbc cbcc cbce cbcr cbec cbee cber cbgb cbir cbkg cbkr cbre ccbc cccb cccc ccci ccee ccgc ccic ccii ccir ccrc ccre ccrg ccri cec- cece ceci ceeb ceec cege ceke cer- cerc cere ceri cgcc cgcg cger cibc cibe cibi cicc cici cicr ciee cier cigi ciii cikr cirb circ cire ciri cirk cirr ckbc ckbe ckbi ckck cker ckrc crbc crcc crce crcr cre- creb crec cree creg crei crib cric crie crig crik crkc ebbc ebbr ebcc eber ebic ecbc ecbe eccb eccc ecce ecci ecib ecig ecrc ecri ecrr eeee eeke eerc eerg egbe egcc egcg egcr egec egee eger eggb egge eggi egir egre egri eick eiec eiei eier eige eigg eike eiki eire ekeb ekek eker ekki erbb erbe ercc erce ereb erec erei erer erg- ergg ergi eric erie erik erke erki errc erre gc-c gcbc gccc gcic gcii gcrg gebe gebi gece geck geek geer gege gegg geic geie geig geir geki gerb gere geri gggg gibb gibe gick gicr gier gige gigg gigi gire girg giri girk girr grbr grcc grce greb grec gree greg grib gric grie grig grrr i-be ibec ibeg ibge ibie ibrc ibri icbc iccb iccc icci iccr icec icee icer icgc icke icrc icre icrr iecc ieie iere ieri igbc igcc iger igkc igri iiie iiii iirc ikee iker ikig ikki ikri irbe ircc ircg iree irer iri- iric irie irig irki irrc irre irri k-ci kbbb kbbc kbbe kbbg kbbi kbbk kbbr kbcb kbce kbci kbck kbcr kbeb kbec kbee kbek kber kbgb kbge kbgg kbgr kbib kbic kbie kbig kbik kbkb kbkg kbkk kbkr kbrb kbrc kbre kbrg kbri kbrk kcbc kcbi kcbk kcbr kccb kccc kcci kcck kccr kceb kcec kcee kceg kcei kcgc kcgi kcgr kcic kcie kcii kcir kckc kckk kckr kcrc kcrg kcri kcrr kebb kebc kebe kebi kebr kecg keck kecr keek keer kege kegg kegi kegk kegr keib keig keii keik keir kekb kekc keke keki ker- kerb kerc kere keri kerk kerr kgbb kgbc kgbr kgcb kgcc kgce kgcr kgeb kgec kggg kggi kggr kgir kgrb kgrc kgre kgrg kgri kgrk kgrr kibb kibc kibe kibg kibi kibr kicb kicc kice kicg kick kicr kier kigc kiic kiii kiik kikc kiki kikk kikr kirb kirc kiri kirk kirr kkbb kkbe kkbg kkbi kkbr kkcb kkci kkck kkcr kkeg kkgb kkgr kkic kkik kkkk kkrb kkrc kkre kkrk kkrr krbb krbe krbg krbi krbk krbr krcb krcc krce krcg krci kreb krec kree krei krek krgi krib krik krkc krke krki krkk krkr krrb krrc krre krrg krri krrk krrr rbbb rbbr rcbc rccb rccc rcgc rcic rcrg rebb rebe rebk recc rece reci reck recr reeb reek rege regi regr reii reik reir reke reki rere rerg reri rgbe rgbi rib- ribe ricc rice rick riek rier rige rigg rigi rike riki rikk rire riri rrrr