a-a a-b a-c aaa aab aac aam aao aar aas aau ab- aba abb abc abm abo abr abs abu ac- aca acb acc acm aco acr acs acu ama amb amc amm amo amr ams amu aoa aob aoc aom aoo aor aos aou ar- ara arb arc arm aro arr ars aru as- asa asb asc asm aso asr ass asu au- aua aub auc aum auo aur aus b-u baa bab bac bam bao bar bas bau bba bbb bbc bbm bbo bbr bbs bbu bca bcb bcc bcm bco bcr bcs bcu bma bmb bmc bmm bmo bmr bms bmu boa bob boc bom boo bor bos bou bra brb brm bro brr brs bru bsa bsb bsc bsm bso bsr bss bsu bua bub buc bum buo bur bus buu c-- caa cab cac cam cao car cas cau cba cbb cbc cbm cbo cbr cbs cbu cca ccb ccc ccm cco ccr ccs ccu cma cmb cmc cmm cmo cmr cms cmu co- coa cob coc com coo cor cos cou cra crb crc crm cro crr crs cru csa csb csc csm cso csr css csu cua cub cuc cum cuo cur cus cuu m-o m-r maa mab mac mam mao mar mas mau mba mbb mbc mbm mbo mbr mbs mbu mc- mca mcb mcc mcm mco mcr mcs mcu mma mmb mmc mmm mmo mmr mms mmu moa mob moc mom moo mor mos mou mra mrb mrc mrm mro mrr mrs mru msa msb msc msm mso msr mss msu mua mub muc mum mur mus muu oaa oab oac oam oao oar oas oau ob- oba obb obc obm obo obr obs obu oc- oca ocb occ ocm oco ocr ocs ocu om- oma omb omc omm omo omr oms omu oo- ooa oob ooc oom ooo oor oos or- ora orb orc orm oro orr ors oru os- osa osb osc osm oso osr oss osu ou- oua ouc oum ouo our ous ra- raa rab rac ram rao rar ras rau rba rbb rbc rbm rbo rbr rbs rbu rca rcb rcc rcm rco rcr rcs rcu rma rmb rmc rmm rmo rmr rms roa rob roc rom roo ror ros rou rra rrb rrc rrm rrr rrs rru rsa rsb rsc rsm rso rsr rss rsu rua rub ruc rum ruo rur rus ruu saa sab sac sam sao sar sas sau sba sbb sbc sbm sbo sbr sbs sbu sca scb scc scm sco scr scs scu sma smb smc smm smo smr sms smu soa sob soc som soo sor sos sou sr- sra srb src srm sro srr srs ss- ssa ssb ssc ssm sso ssr sss ssu sua sub suc sum suo sur sus suu ua- uaa uab uac uam uao uar uas uau uba ubb ubc ubo ubr ubs ubu uca ucb ucc ucm uco ucr ucs ucu um- uma umb umc umm umo umr ums umu uoa uob uoc uom uoo uor uos ur- ura urb urc urm uro urr urs uru usa usb usc usm uso usr uss usu uua uuc uum uur uus uuu

-ous aaaa aaab aaac aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aacm aaco aacr aacs aacu aama aamb aamc aamo aamr aams aaoo aara aarc aarm aaro aars aaru aasa aasc aasm aass aasu aaus abaa abab abac abam abar abas abau abb- abba abbb abbo abbr abbs abca abcb abcc abcr abcs abma abmb abmc abms aboa abob aboo abor abos abou abra abrc abro abrs abs- absa abss absu abua abum abus acaa acab acac acar acas acba acca accc accm acco accs accu acma acmc acms acmu acoa acom acor acos acou acr- acra acrc acrm acro acrr acrs acsa acsc acsm acss acu- acum acuo acur acus amaa amac amam amar amas amb- amba ambo ambr ambs ambu amca amcc amco amcs amm- amma ammo ammu amob amoc amoo amor amos amou amra amrc amro amsa amsc amso amss amua amum amur aoba aoca aocs aoma aora aorb aors aoss aous arab arac aram arar aras arau arba arbs arc- arca arcm arco arcs arma armc armm armo arms armu aroa arob arom aroo aror aros arr- arra arrc arro arrr arrs arru ars- arsa arsc arso arsu arua arub arum asaa asab asac asam asao asar asas asau asba asbm asbo asbu asc- asca ascb ascc asco ascr asma asmm asmr asms asob asoc asom asor asos asou asra asrc asrm asro asrs asru assa assc asso assr asss assu asub asum asur asus auaa auca auma aur- aura auro ausa ausm ausu baaa baam baar baas baba babb babm babo babr babs babu bac- baca bacc baco bacs bama bamb bamc bamm bams bamu baos bar- bara barb barc barm baro barr bars baru basa basc baso bass basu bau- baum baur bbas bbau bbbb bbbs bbcm bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcor bcos bcra bcrs bcru bcsa bcsc bcsm bcss bcuc bmaa bmoc bmus boab boac boar boas boba bobb bobo bobs bobu boca bocm boco bocs bocu boma bomb boms bomu boob booc boom boor boos bor- bora borm boro borr bors boru bosa bosc bosm boso boss bosu boua boum bour bous brab brac bram brao bras brau brca brcb brmc broa brob broc brom broo bror bros brou brrm brrr brrs brsb brsr bruc brum brus bsaa bsac bsam bsas bscs bsms bsos bsra bsrm bssc bssm buar buba bubb bubo bubs bubu buca bucc buco bucs bucu bum- buma bumb bums bur- bura burb burm buro burr burs buru busa busc buss busu buus c-bo caaa caab caac caam caas caba cabo cabs cabu cac- caca cacc cacm caco cacr cama camb camc camm camo cams caor caos cara carb carc carm caro carr cars casa casb casc casm caso casr cass casu cauc caum cauo caus cbac cbar cbbc cbbs cbca