a-a a-b a-c a-t aaa aab aac aak aao aap aat ab- aba abb abc abk abo abp abt ac- aca acb acc ack aco acp act aka akb akc akk ako akp aoa aob aoc aok aoo aop aot ap- apa apb apc apk apo app apt at- ata atb atc ato atp att b-p baa bab bac bak bao bap bat bba bbb bbc bbk bbo bbp bbt bca bcb bcc bck bco bcp bct bka bkb bkc bkk bko bkp bkt boa bob boc bok boo bop bot bpa bpb bpc bpo bpp bpt bta btb btc btk bto btp btt c-- caa cab cac cak cao cap cat cba cbb cbc cbk cbo cbp cbt cca ccb ccc cck cco ccp cct cka ckb ckc cko ckt co- coa cob coc cok coo cop cot cpa cpb cpc cpk cpo cpp cpt cta ctb ctc ctk cto ctp ctt k-t ka- kaa kab kac kak kao kap kat kba kbb kbc kbk kbo kbp kca kcb kcc kck kcp kct kkb kkc kkk kkp kkt koa kob koc kok koo kop kot kpa kpc kpk kpo kpp kpt kta ktb ktc ktk kto ktp ktt oaa oab oac oak oao oap oat ob- oba obb obc obk obo obp obt oc- oca ocb occ ock oco ocp oct oka okb okc okk oko okp oo- ooa oob ooc ook ooo oop oot op- opa opb opc opk opo opp opt ot- ota otb otc otk oto otp ott p-p paa pab pac pak pao pap pat pba pbb pbc pbk pbo pbp pbt pca pcb pcc pck pco pcp pct pka pkb pkc pko pkp pkt poa pob poc pok poo pop pot ppa ppb ppc ppk ppo ppp ppt pt- pta ptb ptc ptk pto ptp ptt taa tab tac tak tao tap tat tba tbb tbc tbk tbo tbp tbt tca tcb tcc tck tco tcp tct tka tkb tkc tkk tko tkp tkt to- toa tob toc tok too top tot tpa tpb tpc tpk tpo tpp tpt tta ttb ttc ttk tto ttp ttt

a-ak a-ok aaaa aaab aaac aaap aaba aabb aabc aabp aabt aaca aacb aacc aack aaco aacp aact aaka aaoo aapa aapc aapo aapt aata aatc aatk aatt abaa abab abac abak abap abat abb- abba abbb abbo abbt abca abcb abcc abcp abct aboa abob abok aboo abot abpa abpc abpp abta ac-t acaa acab acac acap acat acba acca accc acco accp acct acoa acop acot acpa acpt acta actc acto actt akaa akao akap akca akka akko akok akot akpo aoba aoca aokp aopo aotc apac apak apao apap apat apba apca apcb apcc apco apo- apoc apoo apop apot appa appc appt apta aptc aptt at-t ataa atab atac atak atap atat atca atcc atck atco atka atkt atob atoc atok atop atot atta atto attp baaa baak baat baba babb babo bac- baca bacc back baco bact bak- baka bako bakt bapa bapc bapp bapt bata batc bato batt bbbb bcaa bcap bcat bcbc bcbp bcca bccc bcpp bctc bkpt boab boac boak boat boba bobb bobo boca bock boco boka boko boob booc book boop boot bopa bopp bota botb boto bott bpcp bpot btaa btbp btcc btob bttb c-bo caaa caab caac caap caat caba cabo cac- caca cacc cack caco caka capa capb capc capo capp capt cat- cata catb catc cato catt cbac cbat cbbc cbca cbcc cbcp cbct cbka cbko cbot cbpc cbpp cbta cbtc ccaa ccab ccac ccap ccat ccba ccbc ccca cccb cccc cccp ccob ccoc ccpa ccpp cctb cctc cctt ckac ckat ckbc ckck ckco ckoa ckob ckoc ckoo ckot ckpc cktb coak coat coba cobb cobo coca cock coco cocp coct cok- coka coko coob cook coop coot copa copo copp copt cota cotb cotc coto cott cpaa cpac cpap cpbc cpca cppa cptp ctab ctba ctca ctcp ctot ctpo ctpp ctta kaaa kaab kaak kaap kaat kaba kabb kabc kabo kacb kacc kaco kacp kact kaka kakc kakk kako kakt kaoa kaoc kaok kap- kapa kapc kapo kapp kapt kat- kata katb katc katk kato katp katt kbaa kbab kbac kbak kbap kbat kbba kbbb kbbc kbbk kbbo kbbt kbca kbcb kbck kbco kbct kbkb kbkk kbko kboa kbob kboc kbok kboo kbot kbpa kbpc kbpk kbpo kbpt kbta kbtb kbtc kbtk kbto kbtt kcaa kcab kcac kcap kcat kcba kcbc kcbk kcca kccb kccc kcck kcct kckc kckk kcko kcob kcot kcpa kcpc kcpo kcpt kcta kctb kctc kcto kkaa kkac kkap kkat kkba kkbb kkbo kkbt kkcb kkck kkco kkct kkkk kkoa kkob kkoo kkot kkpc kkpk kkpt kktc kktk koab koac koak koap koba kobb kobc kobk kobo koca kocb kock kocp koct koka kokb kokc kokk koko kokp koob kooc kook kooo koop koot kopa kopb kopp kopt kota kotb kotc kotk koto kott kpac kpak kpao kpat kpba kpbb kpcc kpkk kpoa kpob kpoc kpok kpoo kpop kppc kppk kppo kppp kpto kptt ktaa ktak ktao ktap ktat ktba ktbb ktbc ktbt ktcc ktck ktco ktkb ktkc ktkk ktko ktkt ktob ktoc ktok ktoo ktop ktot ktpa ktpk ktpo ktpt kttc kttk ktto kttp kttt obak obba obbo obkb obok obot ocab ocac ocak ocap ocat ocbc occa occc occt ocpa ocpp oct- octa octo okak okap okka okko okok okot okpo okta okto ooaa ooak ooba oooo ootb ootp opap opca opo- oppa oppo opto otac otak otap oto- otok otoo otpp otta otto paak paap paat paba pabt paca pack paco pact paka pako paoc papa papb papp pata pato patt pbac pbcc pboc pbpa pbpk pcaa pcap pcba pcbc pcca pccc pcoa pcpb pcpp poak poat poba pobo poca pock poco poka poko pook poop poot pop- popa popc popo popp popt pota potc poto pott ppac ppap ppcc ppoa pppa pppo pppp ppta pptt ptab ptak ptca ptcc ptop pttc pttk taa- taat taba tabb tabc tabo taca tacc tack taco tact taka takk