bbbb bbci bcbc bccc bcci bcit bctc bcuc bibb bibi bicc bici bick biku bitc bitt bitu bkcy btcc bttb bubb bubi bubu bucc buci buck bucu buic buik buit buiu buki bukk buku buky but- buti butt buty buyi buyu byck byik byit byki cbbc cbcc cbct cbcu cbit cbtc cbyt ccbc cccb cccc ccci cccu ccic ccii cctb cctc cctt ccuc ccut cibc cibi cicc cici cict cicu ciii ciit citb citi citt citu city ciuc ciyu ckbc ckbi ckck ckcy cktb ckty ctbi ctic cub- cubb cubi cuby cucc cuci cuck cui- cuit cuk- cut- cutc cutt cuy- cybb cybc cybi cyc- cycb cycc cyt- cytb cyy- cyyc i-by ibtb ibtc ibuy ibyi icbc iccb iccc icci icct iccu icky icub iiii iiit iitt iiuc ikki ikky itby itic itty iucc iuiu iuty k-ci kbbb kbbc kbbi kbbk kbbt kbbu kbcb kbci kbck kbct kbcu kbcy kbib kbic kbik kbit kbiu kbiy kbkb kbkk kbky kbtb kbtc kbtk kbtt kbub kbuc kbuk kbut kbuu kbuy kbyb kbyi kbyu kcbc kcbi kcbk kcbu kccb kccc kcci kcck kcct kccu kccy kcic kcii kcit kciu kckc kckk kcky kctb kctc kcti kctu kcty kcub kcui kcuk kcyk kcyt kcyy kibb kibc kibi kibt kibu kiby kicb kicc kick kict kicy kiic kiii kiik kiit kiiu kikc kiki kikk kikt kiku kitc kiti kitt kitu kity kiuu kiyi kiyk kiyu kkbb kkbi kkbt kkcb kkci kkck kkct kkcy kkic kkik kkit kkkk kktc kktk kktu kkty kkut kkuu kkyc kkyy ktbb ktbc ktbt ktbu ktby ktcc ktck ktcy ktib ktic ktik ktkb ktkc ktkk ktkt ktku kttc ktti kttk kttt kttu ktty ktub ktuc ktui kubb kubc kubu kuby kucb kucc kuci kuic kuik kuki kukk kuku kuky kuti kutt kutu kuty kuub kuuk kuuu kuyi kuyu kuyy kybb kybc kybi kyby kycc kyck kyct kykc kykk kyky kytc kyti kytt kyty kyuk kyuu kyyi kyyk kyyt kyyy tbcb tbcc tbit tcby tccc tccu tctc tibi tibu ticc tick tiit tiiu tiki tiku tiky titc titi titt titu tiyi ttbb tttt tubb tubu tucc tuck tuik tuit tuiu tuti tutt tutu tuty tybi tyck tyik tyti tytt tyty ubbi ubic ubii ubik ubit ucbc ucci ucky ucut ukcc ukky utby utik utti uttu uuuu yccc yctc yiti ykut ykyt ytky yubu yuck yuit yuki yuku yuky yutu yuty yuyu yyyy