bbbb bbbq bbci bbdd bbrc bcbc bccc bcci bcru bcuc bd-r bdbc bddc bdii bibb bibi bicc bici bick bidi bidr bidu biku biqi birb bird biri birk birr biru brcb bric brid brik briq brkb brrr bruc brud bubb bubi bubq bubu bucc buci buck bucu budb budd budi budu buic buid buik buir buiu buki bukk buku bur- burb burd buri burk burr buru c-cd cbbc cbcc cbcr cbcu cbdb cbdc cbdi cbid cbir cbkr cbqi cbrd ccbc cccb cccc ccci cccu ccdc ccdi ccdr ccic ccid ccii ccir ccrc ccri ccuc cd-r cddb cddr cdic cdii cibc cibi cicc cici cicq cicr cicu cidc cidi cidr ciid ciii cikr cirb circ ciri cirk cirr ciuc ckbc ckbi ckck ckdq ckdu ckrc ckrd crbc crbu crcc crcr crdc crib cric crik criu crkc crub crud cruk cub- cubb cubi cucc cuci cuck cucq cudi cui- cuir cuk- curb curd curi curr dbcc dcbc dccb dccc dcci dccu dcdb dcii dcrk dddd ddrc ddub dibb dici dick didi didu diii diki diku dird dirk dirr dkdc dkid dqcd dqdb drbc drib dric driq drub drui druk druu dub- dubb dubc dubu duck dudd dudu duid duir duki duku duqu duri durk duru duur ibid ibrc ibrd ibri icbc icbd iccb iccc icci iccr iccu icdc icdd icrc icrr icru icub idcr idic idid idiq idir idku idrc idub iicd iiii iirc iiuc ikid ikki ikri ircc ircd ircu irdc iri- iric irid irki irrc irri iucc iuiu k-ci k-id kbbb kbbc kbbd kbbi kbbk kbbr kbbu kbcb kbci kbck kbcq kbcr kbcu kbdb kbdi kbdr kbib kbic kbid kbik kbiq kbiu kbkb kbkk kbkr kbqb kbqi kbqr kbrb kbrc kbrd kbri kbrk kbrq kbru kbub kbuc kbud kbuk kbur kbuu kcbc kcbd kcbi kcbk kcbq kcbr kcbu kccb kccc kccd kcci kcck kccr kccu kcdc kcdd kcdi kcdq kcdr kcdu kcic kcid kcii kcir kciu kckc kckk kckr kcqq kcrc kcri kcrr kcru kcub kcui kcuk kdbb kdbi kdbr kdcc kdcd kdcq kdcr kddb kddc kddd kddi kddk kddq kddr kdic kdkb kdkd kdkk kdkr kdrb kdri kdub kduc kdur kibb kibc kibi kibr kibu kicb kicc kicd kick kicr kidb kidd kidi kidk kidr kidu kiic kiid kiii kiik kiiu kikc kikd kiki kikk kikr kiku kiqi kiqk kiqq kirb kirc kiri kirk kirq kirr kiru kiur kiuu kkbb kkbd kkbi kkbq kkbr kkcb kkcd kkci kkck kkcq kkcr kkdc kkdd kkdq kkic kkid kkik kkiq kkkk kkqq kkrb kkrc kkrk kkrq kkrr kkuu kqbb kqbk kqbr kqbu kqcd kqck kqcr kqdi kqdr kqib kqic kqik kqiq kqkd kqkk kqqk kqqq kqri kqrk kqrq kqrr kqur krbb krbd krbi krbk krbq krbr krcb krcc krcd krci krcq krcu krdc krdd krdr krdu krib krid krik krkc krkd krki krkk krkq krkr krku krqb krqk krqq krqr krqu krrb krrc krri krrk krrq krrr kruc krui kruk krur kubb kubc kubd kubq kubr kubu kucb kucc kucd kuci kucr kudd kudi kudu kuic kuik kuki kukk kuku kuqi kuqq kurb kurd kuri kurk kurq kurr kuru kuub kuuk kuur kuuu qbic qbik qiku qiru qqqq qubi qucu quib quic quid quik quir qurd quri quu- rbbb rbbr rcbc rccb rccc rcdc rcic rcid rcrd rib- ribu ricc rick ridc ridd ridi riki rikk riku riqq riri rrrr rubb rubi rubu ruci ruck rudd rudi ruid ruki rukk ruku rurc rurd ruri ruru ruud ubbi ubic ubid ubii ubik ubir ubud ucbc ucci ucdc ucdd ucrc udbc uddi udic udid udir uduk uirr ukcc ukrc ukur uqcc urbi urci urdu urib uric urik uriu urri uruk uruq urur uuri uuuu