a-a a-b a-c aaa aab aac aad aak aao aar aas aau ab- aba abb abc abd abk abo abr abs abu ac- aca acb acc acd ack aco acr acs acu ad- ada adb adc add adk ado adr ads adu aka akb akc akd akk ako akr aks aku aoa aob aoc aod aok aoo aor aos aou ar- ara arb arc ard ark aro arr ars aru as- asa asb asc asd ask aso asr ass asu au- aua aub auc aud auk auo aur aus b-u baa bab bac bad bak bao bar bas bau bba bbb bbc bbd bbk bbo bbr bbs bbu bca bcb bcc bcd bck bco bcr bcs bcu bda bdb bdc bdd bdk bdo bdr bds bdu bka bkb bkc bkk bko bkr bks boa bob boc bod bok boo bor bos bou bra brb brd brk bro brr brs bru bsa bsb bsc bsd bsk bso bsr bss bsu bua bub buc bud buk buo bur bus buu c-- caa cab cac cad cak cao car cas cau cba cbb cbc cbd cbk cbo cbr cbs cbu cca ccb ccc ccd cck cco ccr ccs ccu cda cdb cdc cdd cdk cdo cdr cds cdu cka ckb ckc ckd cko cks co- coa cob coc cod cok coo cor cos cou cra crb crc crd crk cro crr crs cru csa csb csc csd csk cso csr css csu cua cub cuc cud cuk cuo cur cus cuu daa dab dac dad dak dao dar das dau dba dbb dbc dbd dbk dbo dbr dbs dbu dca dcb dcc dcd dck dco dcr dcs dcu dda ddb ddc ddd ddk ddo ddr dds ddu dka dkb dkc dkk dko dkr dks dku doa dob doc dod dok doo dor dos dou dra drb drc drd drk dro drr drs dru dsa dsb dsc dsd dsk dso dsr dss dsu dua dub duc dud duk duo dur dus ka- kaa kab kac kad kak kao kar kas kau kba kbb kbc kbd kbk kbo kbr kbs kbu kca kcb kcc kcd kck kcr kcs kcu kda kdb kdc kdk kdo kdr kds kdu kkb kkc kkk kkr kks kku koa kob koc kod kok koo kor kos kou kra krc krd krk kro krr krs kru ksa ksb ksc ksd ksk kso ksr kss ksu kub kuc kud kuk kur kus kuu oaa oab oac oad oak oao oar oas oau ob- oba obb obc obd obk obo obr obs obu oc- oca ocb occ ocd ock oco ocr ocs ocu oda odb odc odd odo odr ods odu oka okb okc okd okk oko okr oks oku oo- ooa oob ooc ood ook ooo oor oos or- ora orb orc ord ork oro orr ors oru os- osa osb osc osd osk oso osr oss osu ou- oua ouc oud ouk ouo our ous ra- raa rab rac rad rak rao rar ras rau rba rbb rbc rbd rbk rbo rbr rbs rbu rca rcb rcc rcd rco rcr rcs rcu rda rdb rdc rdd rdo rdr rds rdu rkb rkc rkk rko rks rku roa rob roc rod rok roo ror ros rou rra rrb rrc rrd rrk rrr rrs rru rsa rsb rsc rsd rsk rso rsr rss rsu rua rub ruc rud ruk ruo rur rus ruu saa sab sac sad sak sao sar sas sau sba sbb sbc sbd sbk sbo sbr sbs sbu sca scb scc scd sck sco scr scs scu sda sdb sdc sdd sdk sdo sdr sds sdu sk- ska skb skc skd skk sko skr sks sku soa sob soc sod sok soo sor sos sou sr- sra srb src srd srk sro srr srs ss- ssa ssb ssc ssd ssk sso ssr sss ssu sua sub suc sud suk suo sur sus suu ua- uaa uab uac uad uak uao uar uas uau uba ubb ubc ubk ubo ubr ubs ubu uca ucb ucc ucd uck uco ucr ucs ucu uda udb udc udd udk udo udr uds udu uka ukb ukc ukk ukr uku uoa uob uoc uod uok uoo uor uos ur- ura urb urc urd urk uro urr urs uru usa usb usc usd usk uso usr uss usu uua uuc uur uus uuu

-ous a-ak a-do a-ok aaaa aaab aaac aaad aaar aaas aaba aabb aabc aabd aaca aacb aacc aacd aack aaco aacr aacs aacu aada aadc aads aadu aaka aaku aaoo aara aarc aard aaro aars aaru aasa aasc aasd aass aasu aaus abaa abab abac abad abak abar abas abau abb- abba abbb abbo abbr abbs abca abcb abcc abcd abcr abcs abda abdo abdu aboa abob abod abok aboo abor abos abou abra abrc abro abrs abs- absa absd abss absu abua abud abuk abus acaa acab acac acad acar acas acba acca accc accd acco accs accu acda acdb acdc acds ackd acks acoa acod acor acos acou acr- acra acrc acro acrr acrs acsa acsc acsd acss acu- acuo acur acus adaa adab adac adad adak adao adar adas adba adbc adcc adcs adda addc addd addo addr adds addu adob adoc adod adok adoo ador ados adra adro adrs adsa adso adsr adss adua adub aduk adur akaa akao akar akas akca akka akko akku akok akos akr- akra aksa aksu akua aoba aoca aocs aoks aora aorb aors aosd aoss aous arab arac arad arak arar aras arau arba arbs arc- arca arco arcs arda ardc ardo ards ardu arka arko arks aroa arob arod aroo aror aros arr- arra arrc arrk arro arrr arrs arru ars- arsa arsc arsd arsk arso arsu arua arub arud asaa asab asac asad asak asao asar asas asau asba asbo asbu asc- asca ascb ascc asco ascr asda asdo asds aska asko askr asks asob asoc asod asok asor asos asou asra asrc asro asrs asru assa assc assd assk asso assr asss assu asub asud asur asus auaa auca audc