-ene bbbb bbeb bbet bcbc bccc bcec bcet bcnu bctc bcuc bebb bebe becu beeb been beet bene benn bent benu betc bete bett betu beux bnet btcc btcx btec bten btex bttb bubb bube bubu bucc buce bucu buen bueu bunb bune bunn bunt bunu but- bute butt cbbc cbcc cbce cbcn cbct cbcu cbec cbee cbet cbtc cbux ccbc ccbn cccb cccc cccu ccee ccnb ccnc ccne ccnu cctb cctc cctt ccuc ccut cebu cec- cece cect ceeb ceec cen- cene cent cet- cete ceux cexe cnbc cnet cnex cntc cnut ctec cten ctne cttn cub- cubb cube cucc cuce cucn cune cunt cut- cutc cute cutt cxxx ebbc ebcc eben ecbc ecbe eccb eccc ecce ecct ecne ect- ectc eeee eent eetc eete eetu eext enb- enbn ence enee ennc enne ennu ent- ente enue enut etbc etcc etec etee eten etne ette ettn ettu etun etux eubc exec exen exte nbbc nbcc ncbc nccc nccn ncct nccu ncec ncee ncen ncnc nctc ncte ncue nebb nebe nebn nebu necc nece nect neeb neen neet nene nent nenu net- netb nete nett neuc neue neun neut neuu nexe next nexx nnnn nntn ntbc ntcc nteu ntnu ntuc nubc nube nuce nucu nuee nunc nune nunn nunt nute nutt nutu tbcb tbcc tbce tccc tccu tcnn tctc tebu tect teec teen teet tenb tenc tene tenn tent tenu tete tett tetu tetx teut text tnbc tncc tneb tnut ttbb ttcn tten tttt tubb tube tubu tucc tuen tuet tunb tunc tune tunn tunu tute tutt tutu txcn txen ubbe ubet ucbc ucut uext unbe uncc unce unct uneb unec unee unen unne untb unte unut utec utne uttu uuen uuuu uxue xbee xen- xene xenn xenu xexe xnee xnet xuxu xxxx