aaaa aaab aaac aaap aaba aabb aabc aabp aabt aaca aacb aacc aacp aact aapa aapc aapt aata aatc aatt abaa abab abac abap abat abb- abba abbb abbt abca abcb abcc abcp abct abpa abpc abpp abta ac-t acaa acab acac acap acat acba acca accc accp acct acpa acpt acta actc actt apac apap apat apba apca apcb apcc appa appc appt apta aptc aptt at-t ataa atab atac atap atat atca atcc atta attp baaa baat baba babb bac- baca bacc bact bapa bapc bapp bapt bata batc batt bbbb bcaa bcap bcat bcbc bcbp bcca bccc bcpp bctc bpcp btaa btbp btcc bttb caaa caab caac caap caat caba cac- caca cacc capa capb capc capp capt cat- cata catb catc catt cbac cbat cbbc cbca cbcc cbcp cbct cbpc cbpp cbta cbtc ccaa ccab ccac ccap ccat ccba ccbc ccca cccb cccc cccp ccpa ccpp cctb cctc cctt cpaa cpac cpap cpbc cpca cppa cptp ctab ctba ctca ctcp ctpp ctta paap paat paba pabt paca pact papa papb papp pata patt pbac pbcc pbpa pcaa pcap pcba pcbc pcca pccc pcpb pcpp ppac ppap ppcc pppa pppp ppta pptt ptab ptca ptcc pttc taa- taat taba tabb tabc taca tacc tact tapa tapp tapt tata tatb tatt tbca tbcb tbcc tbta tbtp tcap tcca tccc tcpa tctc tpac tpap tpcp tppa tppp tptp ttab ttbb ttcp tttt