a-a a-b a-c a-t aaa aab aac aao aap aas aat ab- aba abb abc abo abp abs abt ac- aca acb acc aco acp acs act aoa aob aoc aoo aop aos aot ap- apa apb apc apo app aps apt as- asa asb asc aso asp ass ast at- ata atb atc ato atp ats att b-p baa bab bac bao bap bas bat bba bbb bbc bbo bbp bbs bbt bca bcb bcc bco bcp bcs bct boa bob boc boo bop bos bot bpa bpb bpc bpo bpp bps bpt bsa bsb bsc bso bsp bss bst bta btb btc bto btp bts btt c-- caa cab cac cao cap cas cat cba cbb cbc cbo cbp cbs cbt cca ccb ccc cco ccp ccs cct co- coa cob coc coo cop cos cot cpa cpb cpc cpo cpp cps cpt csa csb csc cso csp css cst cta ctb ctc cto ctp cts ctt oaa oab oac oao oap oas oat ob- oba obb obc obo obp obs obt oc- oca ocb occ oco ocp ocs oct oo- ooa oob ooc ooo oop oos oot op- opa opb opc opo opp ops opt os- osa osb osc oso osp oss ost ot- ota otb otc oto otp ots ott p-p paa pab pac pao pap pas pat pba pbb pbc pbo pbp pbs pbt pca pcb pcc pco pcp pcs pct poa pob poc poo pop pos pot ppa ppb ppc ppo ppp pps ppt ps- psa psb psc pso psp pss pst pt- pta ptb ptc pto ptp pts ptt saa sab sac sao sap sas sat sba sbb sbc sbo sbp sbs sbt sca scb scc sco scp scs sct soa sob soc soo sop sos sot spa spb spc spo spp sps spt ss- ssa ssb ssc sso ssp sss sst sta stb stc sto stp sts stt taa tab tac tao tap tas tat tba tbb tbc tbo tbp tbs tbt tca tcb tcc tco tcp tcs tct to- toa tob toc too top tos tot tpa tpb tpc tpo tpp tps tpt tsa tsb tsc tso tsp tss tst tta ttb ttc tto ttp tts ttt

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