a-a a-b a-t aaa aab aad aak aao aar aat ab- aba abb abd abk abo abr abt ad- ada adb add adk ado adr adt aka akb akd akk ako akr aoa aob aod aok aoo aor aot ar- ara arb ard ark aro arr art at- ata atb atd ato atr att baa bab bad bak bao bar bat bba bbb bbd bbk bbo bbr bbt bda bdb bdd bdk bdo bdr bdt bka bkb bkk bko bkr bkt boa bob bod bok boo bor bot bra brb brd brk bro brr brt bta btb btd btk bto btr btt daa dab dad dak dao dar dat dba dbb dbd dbk dbo dbr dbt dda ddb ddd ddk ddo ddr ddt dka dkb dkk dko dkr dkt doa dob dod dok doo dor dot dra drb drd drk dro drr drt dta dtb dtd dtk dto dtr dtt k-t ka- kaa kab kad kak kao kar kat kba kbb kbd kbk kbo kbr kda kdb kdk kdo kdr kdt kkb kkk kkr kkt koa kob kod kok koo kor kot kra krd krk kro krr krt kta ktb ktk kto ktr ktt oaa oab oad oak oao oar oat ob- oba obb obd obk obo obr obt oda odb odd odo odr odt oka okb okd okk oko okr oo- ooa oob ood ook ooo oor oot or- ora orb ord ork oro orr ort ot- ota otb otd otk oto otr ott ra- raa rab rad rak rao rar rat rba rbb rbd rbk rbo rbr rbt rda rdb rdd rdo rdr rdt rkb rkk rko rkt roa rob rod rok roo ror rot rra rrb rrd rrk rrr rrt rta rtb rtd rtk rto rtr rtt taa tab tad tak tao tar tat tba tbb tbd tbk tbo tbr tbt tda tdb tdd tdk tdo tdr tdt tka tkb tkk tko tkr tkt to- toa tob tod tok too tor tot tra trb trd trk tro trr trt tta ttb ttd ttk tto ttr ttt

a-ak a-do a-ok aaaa aaab aaad aaar aaba aabb aabd aabt aada aadt aaka aaoo aara aard aaro aart aata aatk aatt abaa abab abad abak abar abat abb- abba abbb abbo abbr abbt abda abdo aboa abob abod abok aboo abor abot abra abro abta adaa adab adad adak adao adar adat adba adda addd addo addr adob adod adok adoo ador adot adra adro adta akaa akao akar akka akko akok akot akr- akra aoba aora aorb aort aotd arab arad arak arar arat arba arda ardo arka arko aroa arob arod aroo aror arr- arra arrk arro arrr arrt arta arto artr at-t ataa atab atad atak atar atat atdt atka atkt atob atod atok ator atot atra atrk atro atta atto attr baaa baad baak baar baat baba babb babo babr bada badb badd bado badr bak- baka bako bakr bakt bar- bara barb bard bark baro barr bart bata bato batt bbad bbbb bbdd bbdo bd-r boab boad boak boar boat boba bobb bobo boda bodb bodo boka boko boob bood book boor boot bor- bora bord bork boro borr bort bota botb botd boto bott brab brad brak brao brat brda brdo brdt brka brkb broa brob brod brok broo bror brot brrr btaa btdt btob btor btrt bttb d-bo daab daad daar daba dabb dabo dabt dada dado daka dako dara darb dard dark daro darr dart data dato datr datt dbar dbtt dddd ddot dkba doab doak doar doat doba dobb dod- doda dodd dodo doka doko doob dood dook door doot dora dord dork doro dorr dort dota dotd dotk doto dott draa drab drad drak drar drat drba drda drob drod drot drra dtaa dtor dtot kaaa kaab kaak kaar kaat kaba kabb kabd kabo kabr kad- kada kadd kado kadr kadt kaka kakk kako kakt kaoa kaok kaor kara karb kard kark karo karr kart kat- kata katb katd katk kato katr katt kbaa kbab kbad kbak kbar kbat kbba kbbb kbbd kbbk kbbo kbbr kbbt kbdb kbdo kbdr kbkb kbkk kbko kbkr kboa kbob kbod kbok kboo kbot kbra kbrb kbrd kbrk kbro kbrt kbta kbtb kbtk kbto kbtr kbtt kdaa kdab kdad kdak kdao kdar kdat kdbb kdbr kddb kddd kddk kddr kdka kdkb kdkd kdkk kdko kdkr kdkt kdok kdot kdrb kdro kdta kdtd kdtr kkaa kkar kkat kkba kkbb kkbd kkbo kkbr kkbt kkda kkdd kkdo kkdt kkkk kkoa kkob kkoo kkor kkot kkrb kkrk kkro kkrr kkrt kktk koab koak koar koba kobb kobk kobo kobr koda kodk kodo kodt koka kokb kokk koko kokr koob kook kooo koor koot kora korb kord kork koro korr kort kota kotb kotd kotk koto kotr kott krab krad krak krar krat krba krbb krbd krbk krbr krbt krda krdd krdo krdr krka krkd krkk krko krkr kroa krob krod krok kroo kror krrb krrk krro krrr krrt krta krtk krto krtr ktaa ktak ktao ktar ktat ktba ktbb ktbr ktbt ktdb ktdd ktdk ktdo ktdr ktkb ktkk ktko ktkr ktkt ktob ktok ktoo ktor ktot ktrb ktrk ktro ktrr ktrt kttk ktto kttr kttt oara obad obak obba obbo obdt obkb obok obor obot obra obro obtd odbo odda oddd odoo odor odot odra okak okka okko okok okor okot okra okro okta okto ooaa ooak ooba ooda oooo oora oord oort ootb orab orad orak orao orar orat orba orbb orbo orda ordo orka orko oro- orok oror orot orra orro orta orto otak otar otbd oto- otok otoo otor otra otro otta otto raab raad raak raat raba rabb rabk rabo rada radd rado radr radt raka rakk rakt raob raok rara rarb rark raro rata ratk rato ratt rbbb rbbr roab road roak roar roat rob- roba robb robo robt roda rodd rodo roka rokk roko rokr roob rood rook roor root rora rork roro rort rota rotk roto rotr rott rrad rrat rrrr rtdt taa- taar taat taba tabb tabo tada tado taka