bbbb bbci bbdd bbeb bbrc bcbc bccc bcci bcde bcec bcer bcie bd-r bdbc bddc bdii bebb bebe bebi beci beck bede bedi beeb beed beek beer beic beik beir beke beki berc berd bere beri berk berr bibb bibe bibi bicc bice bici bick bide bidi bidr bieb bied bier bike birb bird bire biri birk birr brcb brce breb brec bred bree brei brek brer bric brid brie brik brkb brrr c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdi cbec cbee cber cbid cbir cbkr cbrd cbre ccbc cccb cccc ccci ccdc ccdi ccdr cced ccee ccic ccid ccii ccir ccrc ccre ccri cd-e cd-r cddb cddr cdec cder cdic cdii cdre cec- cece ceci cedd cede cedi ceeb ceec ceke cer- cerc cerd cere ceri cibc cibe cibi cicc cici cicr cidc cide cidi cidr ciee cier ciid ciii cikr cirb circ cire ciri cirk cirr ckbc ckbe ckbi ckck cker ckrc ckrd crbc crcc crce crcr crdc cre- creb crec cred cree crei crib cric crie crik crkc dbcc dcbc dccb dccc dcci dcdb dcii dcrk dddd ddie ddrc ddre debe debi dec- decc decd dece deci deck dedd dede dedi deeb deed deek deer deid deie deir dek- deke der- derb derc dere deri derk derr dibb dibe dice dici dick dide didi dieb died dier diii dike diki dird dire dirk dirr dkdc dkid drbc dred dree drei drek drib dric drie ebbc ebbr ebcc ebed eber ebic ebid ecbc ecbe eccb eccc ecce ecci ecdc eced ecib ecrc ecri ecrr eddc edde eddi ede- edei eder edie edik eede eeee eeke eerc eick eid- eide eidi eidr eiec eied eiei eier eike eiki eird eire ekeb eked ekek eker ekki erbb erbe ercc erce erde erdi ereb erec ered erei erer eric erie erik erke erki errc erre i-be ibec ibed ibid ibie ibrc ibrd ibri icbc icbd iccb iccc icci iccr icdc icdd icde icec iced icee icer icke icrc icre icrr idbe idce idcr idec ided idee ider idic idid idie idir idrc idre iecc iedr ieie iere ieri iicd iide iied iiie iiii iirc ikee iker ikid ikki ikri irbe ircc ircd irdc ired iree irer iri- iric irid irie irki irrc irre irri k-ci k-id kbbb kbbc kbbd kbbe kbbi kbbk kbbr kbcb kbce kbci kbck kbcr kbdb kbde kbdi kbdr kbeb kbec kbed kbee kbek kber kbib kbic kbid kbie kbik kbkb kbkk kbkr kbrb kbrc kbrd kbre kbri kbrk kcbc kcbd kcbi kcbk kcbr kccb kccc kccd kcci kcck kccr kcdc kcdd kcdi kcdr kceb kcec kced kcee kcei kcic kcid kcie kcii kcir kckc kckk kckr kcrc kcri kcrr kdbb kdbi kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddi kddk kddr kdeb kdec kdei kdic kdkb kdkd kdkk kdkr kdrb kdri kebb kebc kebe kebi kebr keck kecr kedb kedc kedd kede kedi kedr keed keek keer keib keid keii keik keir kekb kekc keke keki ker- kerb kerc kere keri kerk kerr kibb kibc kibe kibi kibr kicb kicc kicd kice kick kicr kidb kidd kide kidi kidk kidr kier kiic kiid kiii kiik kikc kikd kiki kikk kikr kirb kirc kiri kirk kirr kkbb kkbd kkbe kkbi kkbr kkcb kkcd kkci kkck kkcr kkdc kkdd kked kkic kkid kkik kkkk kkrb kkrc kkre kkrk kkrr krbb krbd krbe krbi krbk krbr krcb krcc krcd krce krci krdc krdd krde krdr kreb krec kred kree krei krek krib krid krik krkc krkd krke krki krkk krkr krrb krrc krre krri krrk krrr rbbb rbbr rcbc rccb rccc rcdc rcde rcic rcid rcrd rder rebb rebe rebk recc recd rece reci reck recr redc redd rede redi redr reeb reed reek reid reii reik reir reke reki rerd rere reri rib- ribe ricc rice rick ridc ridd ride ridi ried riek rier rike riki rikk rire riri rred rrrr