a-a a-b a-t aaa aab aak aao aap aar aat ab- aba abb abk abo abp abr abt aka akb akk ako akp akr aoa aob aok aoo aop aor aot ap- apa apb apk apo app apr apt ar- ara arb ark aro arp arr art at- ata atb ato atp atr att b-p baa bab bak bao bap bar bat bba bbb bbk bbo bbp bbr bbt bka bkb bkk bko bkp bkr bkt boa bob bok boo bop bor bot bpa bpb bpo bpp bpr bpt bra brb brk bro brp brr brt bta btb btk bto btp btr btt k-t ka- kaa kab kak kao kap kar kat kba kbb kbk kbo kbp kbr kkb kkk kkp kkr kkt koa kob kok koo kop kor kot kpa kpk kpo kpp kpr kpt kra krk kro krp krr krt kta ktb ktk kto ktp ktr ktt oaa oab oak oao oap oar oat ob- oba obb obk obo obp obr obt oka okb okk oko okp okr oo- ooa oob ook ooo oop oor oot op- opa opb opk opo opp opr opt or- ora orb ork oro orp orr ort ot- ota otb otk oto otp otr ott p-p paa pab pak pao pap par pat pba pbb pbk pbo pbp pbr pbt pka pkb pko pkp pkr pkt poa pob pok poo pop por pot ppa ppb ppk ppo ppp ppr ppt pra prb prk pro prp prr prt pt- pta ptb ptk pto ptp ptr ptt ra- raa rab rak rao rap rar rat rba rbb rbk rbo rbp rbr rbt rkb rkk rko rkp rkt roa rob rok roo rop ror rot rpa rpb rpk rpo rpp rpr rpt rra rrb rrk rrp rrr rrt rta rtb rtk rto rtp rtr rtt taa tab tak tao tap tar tat tba tbb tbk tbo tbp tbr tbt tka tkb tkk tko tkp tkr tkt to- toa tob tok too top tor tot tpa tpb tpk tpo tpp tpr tpt tra trb trk tro trp trr trt tta ttb ttk tto ttp ttr ttt

a-ak a-ok aaaa aaab aaap aaar aaba aabb aabp aabt aaka aaoo aapa aapo aapt aara aaro aarp aart aata aatk aatt abaa abab abak abap abar abat abb- abba abbb abbo abbr abbt aboa abob abok aboo abor abot abpa abpp abpr abra abro abta akaa akao akap akar akka akko akok akot akpo akr- akra aoba aokp aopo aora aorb aort apak apao apap apar apat apba apbr apo- apoo apop apor apot appa appr appt apra apro aprt apta aptt arab arak arap arar arat arba arka arko aroa arob aroo aror arpa arr- arra arrk arro arrr arrt arta arto artr at-t ataa atab atak atap atar atat atka atkt atob atok atop ator atot atpr atra atrk atro atrp atta atto attp attr baaa baak baar baat baba babb babo babr bak- baka bako bakr bakt bapa bapp bapt bar- bara barb bark baro barr bart bata bato batt bbbb bbpr bkpr bkpt boab boak boar boat boba bobb bobo boka boko boob book boop boor boot bopa bopp bor- bora bork boro borr bort bota botb boto bott bpot brab brak brao brat brka brkb broa brob brok broo bror brot brrr btaa btbp btob btor btrt bttb kaaa kaab kaak kaap kaar kaat kaba kabb kabo kabr kaka kakk kako kakt kaoa kaok kaor kap- kapa kapo kapp kapt kara karb kark karo karp karr kart kat- kata katb katk kato katp katr katt kbaa kbab kbak kbap kbar kbat kbba kbbb kbbk kbbo kbbr kbbt kbkb kbkk kbko kbkr kboa kbob kbok kboo kbot kbpa kbpk kbpo kbpr kbpt kbra kbrb kbrk kbro kbrt kbta kbtb kbtk kbto kbtr kbtt kkaa kkap kkar kkat kkba kkbb kkbo kkbr kkbt kkkk kkoa kkob kkoo kkor kkot kkpk kkpt kkrb kkrk kkro kkrr kkrt kktk koab koak koap koar koba kobb kobk kobo kobr koka kokb kokk koko kokp kokr koob kook kooo koop koor koot kopa kopb kopp kopr kopt kora korb kork koro korr kort kota kotb kotk koto kotr kott kpak kpao kpar kpat kpba kpbb kpbr kpkk kpkr kpoa kpob kpok kpoo kpop kppk kppo kppp kppr kprb kprk kpro kprp kprr kprt kpto kptr kptt krab krak krap krar krat krba krbb krbk krbr krbt krka krkk krko krkr kroa krob krok kroo krop kror krpa krpr krpt krrb krrk krro krrr krrt krta krtk krto krtr ktaa ktak ktao ktap ktar ktat ktba ktbb ktbr ktbt ktkb ktkk ktko ktkr ktkt ktob ktok ktoo ktop ktor ktot ktpa ktpk ktpo ktpr ktpt ktrb ktrk ktro ktrp ktrr ktrt kttk ktto kttp kttr kttt oara obak obba obbo obkb obok obor obot obra obro okak okap okka okko okok okor okot okpo okra okro okta okto ooaa ooak ooba oooo oora oort ootb ootp opap opar opo- opor oppa oppo opra opto orab orak orao orar orat orba orbb orbo orka orko oro- orok oror orot orra orro orta orto otak otap otar oto- otok otoo otor otpp otra otro otta otto paak paap paar paat paba pabt paka pako papa papb papp papr par- para park paro parp parr part pata pato patr patt pbar pbpa pbpk poak poar poat poba pobo poka poko pook poop poor poot pop- popa popo popp popt pora porb pork poro porr port pota poto pott ppap ppar ppoa pppa pppo pppp ppta pptt prao prar prat pro- proa prob proo prop prot prtp prtr ptab ptak ptop pttk raab raak raat raba rabb rabk rabo raka rakk rakt raob raok raop rapa rapp rapt rara rarb rark raro rata ratk rato ratp ratt rbbb rbbr roab roak roap roar roat rob- roba robb robo robt roka rokk roko rokr roob rook roop roor root ropa ropo rora rork roro rort rota rotk roto rotr rott rpob rpta rrat rrrr rtpa rttp taa- taar taat taba tabb tabo taka takk tako takt taoa