bbbb bbeb bbet bcbc bcbp bccc bcec bcet bcpp bctc bcuc bcup bebb bebe becu beeb beep beet betc bete bett betu bpcp btbp btcc btec bttb bubb bube bubu bucc buce bucu bueu bupc but- bute butt cbbc cbcc cbce cbcp cbct cbcu cbec cbee cbet cbpc cbpp cbtc ccbc cccb cccc cccp cccu ccee ccpe ccpp cctb cctc cctt ccuc ccup ccut cebp cebu cec- cece cecp cect ceeb ceec cepc cepe cepp cept cet- cete cetp cpbc cpce cpcu cpeb cpep cptp ctcp ctec ctep ctpp cub- cubb cube cucc cuce cupe cupp cut- cutc cute cutt ebbc ebcc ecbc ecbe eccb eccc ecce ecct ecpp ect- ectc eeee eetc eete eetu epcc epec epee eppc eppp epte epub etbc etcc etec etee ette ettu eubc pbcc pcbc pccc pcce pcep pcpb pcpp pcte pece pect peec peep peet pepe pete pett peut ppcc pppp pptt ptcc pttc pu-e pube pubu puce puet pueu pupe pupu put- pute putt putu puuc tbcb tbcc tbce tbtp tccc tccu tcep tctc tebu tect teec teet tepe tepp tepu tete tett tetu teut tpcp tppp tpte tptp tput ttbb ttcp tttt tubb tube tubu tucc tuet tupe tupu tute tutt tutu ubbe ubet ubpc ucbc uccp ucpb ucut upbe uppc uppe uppp uppu upup utec utep uttu uucp uuuu