a-a a-b a-t aaa aab aak aao aar aat aau ab- aba abb abk abo abr abt abu aka akb akk ako akr aku aoa aob aok aoo aor aot aou ar- ara arb ark aro arr art aru at- ata atb ato atr att atu au- aua aub auk auo aur aut b-u baa bab bak bao bar bat bau bba bbb bbk bbo bbr bbt bbu bka bkb bkk bko bkr bkt boa bob bok boo bor bot bou bra brb brk bro brr brt bru bta btb btk bto btr btt btu bua bub buk buo bur but buu k-t ka- kaa kab kak kao kar kat kau kba kbb kbk kbo kbr kbu kkb kkk kkr kkt kku koa kob kok koo kor kot kou kra krk kro krr krt kru kta ktb ktk kto ktr ktt ktu kub kuk kur kut kuu oaa oab oak oao oar oat oau ob- oba obb obk obo obr obt obu oka okb okk oko okr oku oo- ooa oob ook ooo oor oot or- ora orb ork oro orr ort oru ot- ota otb otk oto otr ott otu ou- oua ouk ouo our out ra- raa rab rak rao rar rat rau rba rbb rbk rbo rbr rbt rbu rkb rkk rko rkt rku roa rob rok roo ror rot rou rra rrb rrk rrr rrt rru rta rtb rtk rto rtr rtt rtu rua rub ruk ruo rur rut ruu taa tab tak tao tar tat tau tba tbb tbk tbo tbr tbt tbu tka tkb tkk tko tkr tkt to- toa tob tok too tor tot tou tra trb trk tro trr trt tru tta ttb ttk tto ttr ttt ttu tua tub tuk tuo tur tut tuu ua- uaa uab uak uao uar uat uau uba ubb ubk ubo ubr ubt ubu uka ukb ukk ukr uku uoa uob uok uoo uor uot ur- ura urb urk uro urr urt uru uta utb utk uto utr utt utu uua uur uut uuu

a-ak a-ok aaaa aaab aaar aaba aabb aabt aaka aaku aaoo aara aaro aart aaru aata aatk aatt abaa abab abak abar abat abau abb- abba abbb abbo abbr abbt aboa abob abok aboo abor abot abou abra abro abta abtu abua abuk abut akaa akao akar akka akko akku akok akot akr- akra akua aoba aora aorb aort aout arab arak arar arat arau arba arka arko aroa arob aroo aror arr- arra arrk arro arrr arrt arru arta arto artr arua arub arut at-t ataa atab atak atar atat atka atkt atob atok ator atot atra atrk atro atru atta atto attr attu atua atub atuk atur auaa aur- aura auro aut- auto baaa baak baar baat baba babb babo babr babu bak- baka bako bakr bakt baku bar- bara barb bark baro barr bart baru bata bato batt batu bau- bauk baur bbau bbbb boab boak boar boat boba bobb bobo bobu boka boko boku boob book boor boot bor- bora bork boro borr bort boru bota botb boto bott boua bouk bour bout brab brak brao brat brau brka brkb broa brob brok broo bror brot brou brrr brut btaa btob btor btrt bttb buar buat buba bubb bubo bubu buka bukk buko buku bur- bura burb burk buro burr burt buru but- buta buto butt kaaa kaab kaak kaar kaat kaba kabb kabo kabr kabu kaka kakk kako kakt kaku kaoa kaok kaor kara karb kark karo karr kart karu kat- kata katb katk kato katr katt katu kau- kaub kauk kauo kaur kbaa kbab kbak kbar kbat kbba kbbb kbbk kbbo kbbr kbbt kbbu kbkb kbkk kbko kbkr kboa kbob kbok kboo kbot kbra kbrb kbrk kbro kbrt kbru kbta kbtb kbtk kbto kbtr kbtt kbua kbub kbuk kbur kbut kbuu kkaa kkar kkat kkba kkbb kkbo kkbr kkbt kkkk kkoa kkob kkoo kkor kkot kkrb kkrk kkro kkrr kkrt kktk kktu kkua kkut kkuu koab koak koar koba kobb kobk kobo kobr kobu koka kokb kokk koko kokr koku koob kook kooo koor koot koou kora korb kork koro korr kort koru kota kotb kotk koto kotr kott kotu koua koub kour kout kouu krab krak krar krat krba krbb krbk krbr krbt krka krkk krko krkr krku kroa krob krok kroo kror krrb krrk krro krrr krrt krta krtk krto krtr krua kruk krur ktaa ktak ktao ktar ktat ktba ktbb ktbr ktbt ktbu ktkb ktkk ktko ktkr ktkt ktku ktob ktok ktoo ktor ktot ktrb ktrk ktro ktrr ktrt ktru kttk ktto kttr kttt kttu ktub kuar kuat kuau kuba kubb kubo kubr kubu kuka kukk kuku kuoa kuok kuoo kura kurb kurk kuro kurr kurt kuru kuta kuto kutr kutt kutu kuub kuuk kuur kuuu oaau oara obak obba obbo obkb obok obor obot obra obro okak okka okko okok okor okot okra okro okta okto okur ooaa ooak ooba ooku oooo oora oort ootb orab orak orao orar orat orba orbb orbo orbu orka orko oro- orok oror orot orra orro orta orto orub otak otar oto- otok otoo otor otra otro otta otto ottu otur ouat our- oura ouro ourt out- outa outb outo ouu- raab raak raat raba rabb rabk rabo rabu raka rakk rakt raku raob raok rara rarb rark raro rata ratk rato ratt ratu raua raub rauk raut rbbb rbbr roab roak roar roat rob- roba robb robo robt robu roka rokk roko rokr roku roob rook roor root rora rork roro rort roru rota rotk roto rotr rott roua roub rouk rout rrat rrrr ruba rubb rubu ruka rukk ruku ruok rura ruro ruru ruta ruto rutt rutu taa- taar taat taba tabb tabo tabu taka takk tako takt taku taoa taor taou tara tarb tark taro tarr tart taru tata tatb tato tatr tatt tatu taua taub tauk taur taut tbar tbrb tbta toab toat toau toba tobo tobt tobu toka toko toku tooa took toor toot tora tork toro torr tort toru tota