a-ii aaaa aaab aaac aaai aaap aaba aabb aabc aabi aabp aaca aacb aacc aaci aacp aacu aaib aaic aaii aapa aapc aapi aaup abaa abab abac abai abap abau abb- abba abbb abbi abca abcb abcc abci abcp abia abib abic abiu abpa abpc abpi abpp abua acaa acab acac acai acap acba acca accc acci accp accu aci- acia acic acip acpa acpi acpu acu- acup aiai aiba aica aicc aicp aiia aiib aiic aipa aipi aiui apac apai apap apba apca apcb apcc api- apia apic apip appa appc appu apua apuc apup auaa auca auci aucp aupc ba-i baaa baba babb babi babu bac- baca bacc baci baia baib baic bapa bapc bapi bapp bapu bau- bbau bbbb bbci bcaa bcap bcbc bcbp bcca bccc bcci bcia bcpp bcuc bcup biap biba bibb bibi bica bicc bici bipa bipp bipu bpai bpcp buba bubb bubi bubu buca bucc buci bucu buic buiu bupa bupc caaa caab caac caap caba cabi cabu cac- caca cacc caci caia caib caic caip caiu capa capb capc capi capp capu cauc caup cbac cbbc cbca cbcc cbcp cbcu cbia cbpc cbpp ccaa ccab ccac ccai ccap ccba ccbc ccca cccb cccc ccci cccp cccu ccic ccii ccip ccpa ccpp ccuc ccup ciaa ciau ciba cibc cibi cica cicc cici cicu ciia ciii cipa cipp ciuc ciup cpaa cpac cpap cpbc cpca cpcu cpia cpic cppa cuau cub- cuba cubb cubi cuca cucc cuci cui- cupp iaaa iaac iaai iaap iaba iaca iacc iacp iacu iaia iapa iapp iapu ibac ibca ibia icaa icab icac icai icap icbc icbp icca iccb iccc icci iccp iccu icpa icpc icub icup iiac iica iiii iipa iiuc ipac ipba ipca ipcc ippa ippc iucc iuiu iupa iupp paap paba pabu paca paci pacu paia paib paip papa papb papi papp paua paup pbac pbcc pbpa pcaa pcap pcba pcbc pcca pccc pcia pcip pcpb pcpp piai piau pibb pibi pica picc pici picu piia piip pipa pipi pipp ppac ppap ppcc ppci ppib ppic pppa pppp pubu puca puiu pupa pupi pupu puuc uabc uaca uaua ubac ubba ubbi ubic ubii ubpc ucai ucbc ucca ucci uccp ucpa ucpb ucua uica uipi upac upca upci upic uppa uppc uppp uppu upup uucp uuuu