bbbb bbci bblb bbrc bcbc bccc bcci bccl bcit bcru bctc bcuc bibb bibi bibl bicc bici bili bill bilt bilu birb biri birl birr birt biru bitc bitt bitu blbt blcu blic blir blit blrc blub blur blut brcb bric bril brit brrr brtc bruc brut btcc btcl btrc btrt bttb bubb bubi bubu bucc buci bucu buic buir buit buiu bulb buli bull bult bulu bur- burb buri burl burr burt buru but- buti butt cbbc cbcc cbcl cbcr cbct cbcu cbir cbit cblb cblc cbrl cbrt cbtc cbtl ccbc cccb cccc ccci cccl cccu ccic ccii ccil ccir cclc ccli ccrc ccri ccrl ccrt cctb cctc cctl cctt ccuc ccut cibc cibi cicc cici cicr cict cicu ciii ciit cili cill cilt cirb circ ciri cirl cirr cirt citb citi citl citt citu ciuc clib clic clii clir clit clri cltb cltc club clut crbc crbu crcc crcr crib cric crit criu crrt crtc crtl crub crut ctbi ctic ctrc ctrl cub- cubb cubi cucc cuci cui- cuil cuir cuit culb culc cull cult curb curi curl curr curt cut- cutc cutt ibrc ibri ibtb ibtc ibtl icbc iccb iccc icci iccl iccr icct iccu icll iclr icrc icrr icrt icru icub iiii iiit iirc iitr iitt iiuc ilbc ilic ilir ilit ill- illi illt ilut ircc ircu iri- iric iril irlb irrc irri irti irul itic itil itll itri itur iucc iuiu lbcc lblr lbrt lcbc lccc lcrl lctl libc libr libu licr lict liii liir lilb lili lill lilt lilu lirc liri lirl lirr lirt liru litb liti litl litr litt litu liut llcc lllc llll lric lrrc lrrr ltbl ltcc ltci ltib lttc lttr ltuc luci luit luli lull lulu luri lurt luti rbbb rbbr rbcl rcbc rccb rccc rcic rctc rcti rib- ribu ricc rict rill rilu riri riti ritl ritt ritu rrrr rtcc rtlt rubb rubi rubu ruci ruct ruit rull rurc ruri ruru ruti rutl rutt rutu tbcb tbcc tbil tbit tbrb tccc tccu tctc tcul tibi tibu ticc tiit tiiu till tilr tilt tirb tiri tirl tirr tiru titc titi titt titu tlli trcc trcl tri- trib tric tril trit trtc trtr trub truc trut truu ttbb tttt ttul tubb tubr tubu tucc tuil tuit tuiu tuli tull tulu turb turc turi turr turt turu tuti tutl tutt tutu ubbi ubic ubii ubir ubit ubli ucbc ucci ucil ucrc ucut uirr ulbc ulcc ulic ulli ullr ulti ultt ulul urbi urci urib uric uriu urri urur urut util utri utti uttu uulu uuri uuuu