a-a a-b aaa aab aad aak aao aar aav ab- aba abb abd abk abo abr abv ad- ada adb add adk ado adr adv aka akb akd akk ako akr akv aoa aob aod aok aoo aor aov ar- ara arb ard ark aro arr arv av- ava avb avd avk avo avr baa bab bad bak bao bar bav bba bbb bbd bbk bbo bbr bda bdb bdd bdk bdo bdr bdv bka bkb bkk bko bkr bkv boa bob bod bok boo bor bov bra brb brd brk bro brr brv bva bvb bvd bvk bvo bvr bvv daa dab dad dak dao dar dav dba dbb dbd dbk dbo dbr dbv dda ddb ddd ddk ddo ddr dka dkb dkk dko dkr doa dob dod dok doo dor dov dra drb drd drk dro drr drv dva dvb dvd dvk dvr ka- kaa kab kad kak kao kar kav kba kbb kbd kbk kbo kbr kda kdb kdk kdo kdr kkb kkk kkr kkv koa kob kod kok koo kor kra krd krk kro krr krv kva kvb kvk kvo kvr kvv oaa oab oad oak oao oar oav ob- oba obb obd obk obo obr obv oda odb odd odo odr odv oka okb okd okk oko okr oo- ooa oob ood ook ooo oor oov or- ora orb ord ork oro orr orv ov- ova ovb ovd ovo ovv ra- raa rab rad rak rao rar rav rba rbb rbd rbk rbo rbr rda rdb rdd rdo rdr rdv rkb rkk rko rkv roa rob rod rok roo ror rov rra rrb rrd rrk rrr rva rvb rvd rvo rvr rvv v-a vaa vab vad vak vao var vav vba vbd vbk vbo vbr vbv vdb vdd vdk vdo vdr vdv vka vkb voa vob vod vok voo vor vov vra vrb vrd vrk vrr vva vvb vvo vvr vvv

a-ak a-do a-ok aaaa aaab aaad aaar aaav aaba aabb aabd aada aaka aaoo aara aard aaro aava abaa abab abad abak abar abb- abba abbb abbo abbr abda abdo aboa abob abod abok aboo abor abov abra abro abva abvd adaa adab adad adak adao adar adba adda addd addo addr adob adod adok adoo ador adra adro advb akaa akao akar akka akko akok akr- akra aoba aora aorb arab arad arak arar arba arda ardo arka arko aroa arob arod aroo aror arr- arra arrk arro arrr arva arvo avab avao avar avda avor avra avro avva avvo baaa baad baak baar baba babb babo babr bada badb badd bado badr bak- baka bako bakr bar- bara barb bard bark baro barr bava bbad bbbb bbdd bbdo bd-r bdav boab boad boak boar boba bobb bobo boda bodb bodo boka boko boob bood book boor bor- bora bord bork boro borr bova bovo brab brad brak brao brav brda brdo brka brkb broa brob brod brok broo bror brrr d-bo daab daad daar daba dabb dabo dada dado daka dako dara darb dard dark daro darr dava dbar dddd dkba doab doak doar doba dobb dod- doda dodd dodo doka doko doob dood dook door dora dord dork doro dorr draa drab drad drak drar drba drda drob drod drra dvar dvda dvdr dvoa dvor dvra kaaa kaab kaak kaar kaba kabb kabd kabo kabr kad- kada kadd kado kadr kadv kaka kakk kako kaoa kaok kaor kara karb kard kark karo karr karv kava kavb kavo kavv kbaa kbab kbad kbak kbar kbba kbbb kbbd kbbk kbbo kbbr kbdb kbdo kbdr kbdv kbkb kbkk kbko kbkr kbkv kboa kbob kbod kbok kboo kbov kbra kbrb kbrd kbrk kbro kbrv kbva kbvb kbvo kbvr kdaa kdab kdad kdak kdao kdar kdav kdbb kdbr kdbv kddb kddd kddk kddr kdka kdkb kdkd kdkk kdko kdkr kdok kdov kdrb kdro kdrv kdva kdvb kdvr kdvv kkaa kkar kkba kkbb kkbd kkbo kkbr kkda kkdd kkdo kkdv kkkk kkoa kkob kkoo kkor kkov kkrb kkrk kkro kkrr kkrv kkvr kkvv koab koak koar koba kobb kobk kobo kobr koda kodk kodo kodv koka kokb kokk koko kokr koob kook kooo koor koov kora korb kord kork koro korr korv kova kovk kovo kovr krab krad krak krar krav krba krbb krbd krbk krbr krda krdd krdo krdr krka krkd krkk krko krkr krkv kroa krob krod krok kroo kror krov krrb krrk krro krrr krva krvb krvk krvo krvr krvv kvab kvak kvar kvbr kvda kvoa kvob kvod kvok kvoo kvor kvov kvra kvro kvrr kvrv kvvr kvvv oara obad obak obba obbo obkb obok obor obra obro odbo odda oddd odoo odor odra odva okak okka okko okok okor okra okro ooaa ooak ooba ooda oooo oora oord orab orad orak orao orar orav orba orbb orbo orda ordo orka orko oro- orok oror orra orro orvr ovar ovda ovo- ovod ovoo ovra raab raad raak raba rabb rabk rabo rada radd rado radr raka rakk raob raok rara rarb rark raro rava rbbb rbbr roab road roak roar rob- roba robb robo roda rodd rodo roka rokk roko rokr roob rood rook roor rora rork roro rova rovo rrad rrrr vaad vaar vada vado vaka vara vard vark varr vava vkor voad voar voda vodo voka voor vor- vora vord voro vovk vrak vrav vrba vvob vvvv

-aaa- -abad aabaa aabba aabra aakko abaab ababa abada abaka abako abara abava abbad abbar abbod abkar abkoo aboab aboad abobo abood abook abora abord abovo abrad abrak abrar abrod adaba adada adado adaka adara adark adaro adava addra adkar adoar adobo adodb adoor adora adoro adrad adrar adroa akaba akabo akaoa akard akbar akkad akkra akobo akoda akoka akoko akova akrak akrar akro- ar-ab arab- araba arabo arada arado arara arava arbab arbar arbok arbor ardab ardak ardod ardor ardra arkar aroab aroad aroar aroba aroor arora arrak arvad arvak arvar avara avard avaro avoda avord b-r-k baard baava babak babar babdo babka baboo babra badak badao badar baddo badod badoo badra bakar bakka