a-a a-b aaa aab aad aak aao aar aas aav ab- aba abb abd abk abo abr abs abv ad- ada adb add adk ado adr ads adv aka akb akd akk ako akr aks akv aoa aob aod aok aoo aor aos aov ar- ara arb ard ark aro arr ars arv as- asa asb asd ask aso asr ass asv av- ava avb avd avk avo avr avs baa bab bad bak bao bar bas bav bba bbb bbd bbk bbo bbr bbs bda bdb bdd bdk bdo bdr bds bdv bka bkb bkk bko bkr bks bkv boa bob bod bok boo bor bos bov bra brb brd brk bro brr brs brv bsa bsb bsd bsk bso bsr bss bsv bva bvb bvd bvk bvo bvr bvs bvv daa dab dad dak dao dar das dav dba dbb dbd dbk dbo dbr dbs dbv dda ddb ddd ddk ddo ddr dds dka dkb dkk dko dkr dks doa dob dod dok doo dor dos dov dra drb drd drk dro drr drs drv dsa dsb dsd dsk dso dsr dss dsv dva dvb dvd dvk dvr dvs ka- kaa kab kad kak kao kar kas kav kba kbb kbd kbk kbo kbr kbs kda kdb kdk kdo kdr kds kkb kkk kkr kks kkv koa kob kod kok koo kor kos kra krd krk kro krr krs krv ksa ksb ksd ksk kso ksr kss ksv kva kvb kvk kvo kvr kvs kvv oaa oab oad oak oao oar oas oav ob- oba obb obd obk obo obr obs obv oda odb odd odo odr ods odv oka okb okd okk oko okr oks oo- ooa oob ood ook ooo oor oos oov or- ora orb ord ork oro orr ors orv os- osa osb osd osk oso osr oss osv ov- ova ovb ovd ovo ovs ovv ra- raa rab rad rak rao rar ras rav rba rbb rbd rbk rbo rbr rbs rda rdb rdd rdo rdr rds rdv rkb rkk rko rks rkv roa rob rod rok roo ror ros rov rra rrb rrd rrk rrr rrs rsa rsb rsd rsk rso rsr rss rsv rva rvb rvd rvo rvr rvs rvv saa sab sad sak sao sar sas sav sba sbb sbd sbk sbo sbr sbs sbv sda sdb sdd sdk sdo sdr sds sdv sk- ska skb skd skk sko skr sks soa sob sod sok soo sor sos sov sr- sra srb srd srk sro srr srs srv ss- ssa ssb ssd ssk sso ssr sss ssv sva svb svd svk svo svr svs svv v-a vaa vab vad vak vao var vas vav vba vbd vbk vbo vbr vbs vbv vdb vdd vdk vdo vdr vds vdv vka vkb voa vob vod vok voo vor vos vov vra vrb vrd vrk vrr vrs vsa vsb vsd vsk vso vsr vss vsv vva vvb vvo vvr vvs vvv

a-ak a-do a-ok aaaa aaab aaad aaar aaas aaav aaba aabb aabd aada aads aaka aaoo aara aard aaro aars aasa aasd aass aava abaa abab abad abak abar abas abb- abba abbb abbo abbr abbs abda abdo aboa abob abod abok aboo abor abos abov abra abro abrs abs- absa absd abss abva abvd adaa adab adad adak adao adar adas adba adda addd addo addr adds adob adod adok adoo ador ados adra adro adrs adsa adso adsr adss advb advs akaa akao akar akas akka akko akok akos akr- akra aksa aoba aoks aora aorb aors aosd aoss arab arad arak arar aras arba arbs arda ardo ards arka arko arks aroa arob arod aroo aror aros arr- arra arrk arro arrr arrs ars- arsa arsd arsk arso arva arvo asaa asab asad asak asao asar asas asba asbo asda asdo asds aska asko askr asks asob asod asok asor asos asra asro asrs assa assd assk asso assr asss asva asvd asvs avab avao avar avas avda avor avos avra avro avva avvo baaa baad baak baar baas baba babb babo babr babs bada badb badd bado badr bads bak- baka bako bakr baks baos bar- bara barb bard bark baro barr bars basa bask baso bass bava bbad bbas bbbb bbbs bbdd bbdo bd-r bdav bdos bdsd boab boad boak boar boas boba bobb bobo bobs boda bodb bodo bods boka boko boks boob bood book boor boos bor- bora bord bork boro borr bors bosa bosk boso boss bova bovo brab brad brak brao bras brav brda brdo brds brka brkb broa brob brod brok broo bror bros brrr brrs brsb brsr bsaa bsas bsbd bsod bsos bsra bsrd bssd bvds d-bo daab daad daar daas daba dabb dabo dabs dada dado dads daka dako daks daos dara darb dard dark daro darr dars dasa dasb dasd dask dass dava dbar dbas dbos dbrs dbsa dbss dddd ddss dkba doab doak doar doas doba dobb dobs dod- doda dodd dodo dods doka doko doob dood dook door doos dora dord dork doro dorr dors dosa dosk doso doss draa drab drad drak drar dras drba drda drob drod drra drrs drsa dsba dsda dsdr dsoa dsos dsrr dssa dsvd dvar dvas dvbs dvda dvdr dvds dvoa dvor dvra dvrs dvsr k-os kaaa kaab kaak kaar kaas kaba kabb kabd kabo kabr kad- kada kadd kado kadr kads kadv kaka kakk kako kaks kaoa kaok kaor kaos kara karb kard kark karo karr kars karv kas- kasa kasb kask kaso kasr kass kava kavb kavo kavs kavv kbaa kbab kbad kbak kbar kbas kbba kbbb kbbd kbbk kbbo kbbr kbbs kbdb kbdo kbdr kbds kbdv kbkb kbkk kbko kbkr kbkv kboa kbob kbod kbok kboo kbos kbov kbra kbrb kbrd kbrk kbro kbrv kbsa kbsb kbsk kbso kbsr kbss kbsv kbva kbvb kbvo kbvr kdaa kdab kdad kdak kdao kdar kdav kdbb kdbr kdbs kdbv kddb kddd kddk kddr kdka kdkb kdkd kdkk kdko kdkr kdok kdov kdrb kdro kdrs kdrv kdsd kdsk kdsr kdss kdva kdvb