aaaa aaab aaac aaap aaba aabb aabc aabp aabt aaca aacb aacc aacp aact aacu aapa aapc aapt aata aatc aatt aaup abaa abab abac abap abat abau abb- abba abbb abbt abca abcb abcc abcp abct abpa abpc abpp abta abtu abua abut ac-t acaa acab acac acap acat acba acca accc accp acct accu acpa acpt acpu acta actc actt actu acu- acup acut apac apap apat apba apca apcb apcc appa appc appt appu apta aptc aptt apua apuc apup at-t ataa atab atac atap atat atca atcc atta attp attu atua atub atuc auaa auca aucp auct aupc aut- baaa baat baba babb babu bac- baca bacc bact bapa bapc bapp bapt bapu bata batc batt batu bau- bbau bbbb bcaa bcap bcat bcbc bcbp bcca bccc bcpp bctc bcuc bcup bpcp btaa btbp btcc bttb buat buba bubb bubu buca bucc bucu bupa bupc but- buta butt caaa caab caac caap caat caba cabu cac- caca cacc capa capb capc capp capt capu cat- cata catb catc catt catu cauc caup caut cbac cbat cbbc cbca cbcc cbcp cbct cbcu cbpc cbpp cbta cbtc ccaa ccab ccac ccap ccat ccba ccbc ccca cccb cccc cccp cccu ccpa ccpp cctb cctc cctt ccuc ccup ccut cpaa cpac cpap cpbc cpca cpcu cppa cptp ctab ctba ctca ctcp ctpp ctta cuau cub- cuba cubb cuca cucc cupp cut- cuta cutc cutt paap paat paba pabt pabu paca pact pacu papa papb papp pata patt patu paua paup paut pbac pbcc pbpa pcaa pcap pcba pcbc pcca pccc pcpb pcpp ppac ppap ppcc pppa pppp ppta pptt ptab ptca ptcc pttc pubu puca pupa pupu put- puta putt putu puuc taa- taat taba tabb tabc tabu taca tacc tact tapa tapp tapt tapu tata tatb tatt tatu taua taub tauc taut tbca tbcb tbcc tbta tbtp tcap tcca tccc tccu tcpa tctc tpac tpap tpau tpcp tppa tppp tptp tput ttab ttbb ttcp tttt tuat tuba tubb tubu tuca tucc tupa tupu tuta tutt tutu uabc uaca uata uatu uaua ubac ubba ubpc ucat ucbc ucca uccp ucpa ucpb ucua ucut upac upat upca uppa uppc uppp uppu upup utac utau utpa uttu uucp uuta uuuu