bbbb bbci bbin bcbc bccc bcci bcit bcnu bctc bcuc bibb bibi bicc bici biin bin- binc bini binn bint binu bitc bitt bitu bnib bnin btcc bttb bubb bubi bubu bucc buci bucu buic buin buit buiu bunb buni bunn bunt bunu but- buti butt cbbc cbcc cbcn cbct cbcu cbit cbtc ccbc ccbn cccb cccc ccci cccu ccic ccii ccnb ccnc ccni ccnu cctb cctc cctt ccuc ccut cibc cibi cicc cici cict cicu ciii ciit cin- cinc cini cint citb citi citt citu ciuc cnbc cnci cnib cnic cntc cnut ctbi ctic cttn cub- cubb cubi cucc cuci cucn cui- cuin cuit cunt cut- cutc cutt ibtb ibtc icbc iccb iccc icci iccn icct iccu icnb icnc icub iiii iiit iitt iiuc incb inci init inni innu inti intn intu inui inun itic itin iucc iuiu n-ii nbbc nbcc nbci nbic nbti ncbc ncbi nccc ncci nccn ncct nccu ncit ncnc nctc nibi nicc nici nicu niit niiu nini nitb nitc niti nnit nnnn nntn ntbc ntcc ntnu ntuc ntui nubc nubi nuci nucu nuin nuit nunc nunn nunt nutt nutu tbcb tbcc tbit tccc tccu tcnn tctc tibi tibu ticc tiit tiiu tinc tini tinn tint tinu titc titi titt titu tnbc tncc tnut ttbb ttcn tttt tubb tubu tucc tuin tuit tuiu tunb tunc tuni tunn tunu tuti tutt tutu ubbi ubic ubii ubit ucbc ucci ucin ucut uint uncc unci unct uni- unic unii unin unit unni untb unut utin utti uttu uuni uuuu