aaaa aaab aaac aaap aaas aaba aabb aabc aabp aabt aaca aacb aacc aaco aacp aacs aact aaoo aapa aapc aapo aaps aapt aasa aasc aass aast aata aatc aatt abaa abab abac abap abas abat abb- abba abbb abbo abbs abbt abca abcb abcc abcp abcs abct aboa abob aboo abos abot abpa abpc abpp abps abs- absa absp abss abta abts ac-t acaa acab acac acap acas acat acba acca accc acco accp accs acct acoa acop acos acot acpa acps acpt acsa acsc acss acst acta actc acto acts actt aoba aoca aocs aopo aosp aoss aotc apac apao apap apas apat apba apbs apca apcb apcc apco apcs apo- apoc apoo apop apos apot appa appc apps appt apsa apso apss apta aptc apts aptt asaa asab asac asao asap asas asat asba asbo asc- asca ascb ascc asco ascp asct asob asoc asop asos asot aspa aspc aspo asps aspt assa assc asso assp asss asst asta astb astc asto astp asts at-t ataa atab atac atap atas atat atbs atca atcc atco atcs atob atoc atop atos atot atsb atsc atst atta atto attp atts baaa baas baat baba babb babo babs bac- baca bacc baco bacs bact baos bapa bapc bapp baps bapt basa basc baso bass bast bata batc bato bats batt bbas bbbb bbbs bcaa bcap bcas bcat bcbc bcbp bcbs bcca bccc bccs bcos bcpp bcps bcsa bcsc bcss bctc bcts boab boac boas boat boba bobb bobo bobs boca boco bocs boob booc boop boos boot bopa bopp bops bosa bosc boso boss bost bota botb boto bots bott bpcp bpot bpsa bsaa bsac bsap bsas bsat bscp bscs bsos bspp bssc bsts btaa btbp btcc btcs btob btps btss bttb c-bo caaa caab caac caap caas caat caba cabo cabs cac- caca cacc caco caos capa capb capc capo capp caps capt casa casb casc caso casp cass cast cat- cata catb catc cato cats catt cbac cbat cbbc cbbs cbca cbcc cbcp cbcs cbct cbot cbpc cbpp cbsa cbsc cbta cbtc ccaa ccab ccac ccap ccas ccat ccba ccbc ccca cccb cccc cccp cccs ccob ccoc ccpa ccpp ccps ccsa ccsp ccss ccst cctb cctc cctt coas coat coba cobb cobo cobs coca coco cocp coct coob coop coos coot copa copo copp cops copt cosa cosc coso cosp coss cost cota cotb cotc coto cots cott cpaa cpac cpap cpas cpbc cpca cpcs cpos cppa cpps cpsa cpsc cpso cptp cpts csaa csab csac csao csas csat cscb cscc csco cscs csob csos csot cspa cspb cspc csps cspt cssa csta cstc csto csts ctab ctba ctbs ctca ctcp ctos ctot ctpo ctpp ctps ctsa ctsc ctss ctta ctts oaps oasc oass oast oats obas obba obbo obos obot obss obst obts ocab ocac ocap ocas ocat ocbc occa occc occt ocos ocpa ocpp ocsa oct- octa octo octs ooaa ooba oooo ooos oops oosa oost ootb ootp oots opap opca opo- opos oppa oppo opps opsa opto opts osap osas osat osba osbp osca oscc osco osoo osos ossa ossb osso osta ostc osts otac otap otas otbs oto- otoo otos otpp otsa otso otta otto otts paap paas paat paba pabt paca paco pacs pact paoc paos papa papb papp paps pasa pasc paso pasp pass past pata pato pats patt pbac pbcc pboc pbpa pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcoa pcos pcpb pcpp pcps pcsa pcso pcts poas poat poba pobo pobs poca poco pocs poop poos poot pop- popa popc popo popp pops popt posa posb poso poss post pota potc poto pots pott ppac ppap ppcc ppcs ppoa ppos pppa pppo pppp ppps ppss ppta ppts pptt psac psap psas psat psbt psca psco psoa psoc psos pspp psps pssa pssc psso psst psts ptab ptas ptca ptcc ptop ptsa pttc s-os sa-c saab saac saap saas saat saba sabb sabc sabo sabs saca sacc saco sacs sact saos sapa sapo sapp saps sasa sasc saso sass sast sata satb satc sato sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbot sbsa sbsp sbst sbtc scaa scab scac scap scas scat scba sccc sccp sccs scct scob scoo scop scot scpa scpb scpo scps scpt scsa scsc scso scst sctc scto scts soap soas soat soba sobo sobp sobs sobt soca soco socs soop soos soot sopa sopo sopp sops sosa soso soss sost sota sotc soto sotp sots sp-a spac spap spas spat spca spcc spco spcs spoc spoo spop spos spot spps spsa spso spsp spss spst spta sptb sptc spto spts ssaa ssab ssac ssao ssap ssas ssat ssca sscc sscp sscs ssoc ssop ssot sspa sspc sspo ssps sspt sssa sssb sssc ssss ssta sstb sstc sstp ssts stab stac stap stas stat stbc stbs stca stcc stcp stcs stoa stob stoo stop stos stot stpp stps stss sttc taa- taas taat taba tabb tabc tabo tabs taca tacc taco tacs tact taoa taos tapa tapo tapp taps tapt tasa tasb tasc tasp tass tast tata tatb tato tats tatt tbas tbbs tbca tbcb tbcc tbsp tbst tbta tbtp tcap tcbs tcca tccc tcos tcpa tcpo tctc tcts toab toas toat toba tobo tobs tobt toca toco tooa toos toot top- topa topo topp tops topt tosa tosb tosc toso toss tost tota totc toto tots tott tpac tpap tpcp tpcs tppa tppp tpsa tpsc tptp tsaa tsao tsat tsbc tsca tscc tscp tsob tsop tsos tspo tsps tspt tssa tsst tstc tsts ttab ttbb ttcp ttop ttss tttt