a-a a-b a-c aaa aab aac aam aao aar aas ab- aba abb abc abm abo abr abs ac- aca acb acc acm aco acr acs ama amb amc amm amo amr ams aoa aob aoc aom aoo aor aos ar- ara arb arc arm aro arr ars as- asa asb asc asm aso asr ass baa bab bac bam bao bar bas bba bbb bbc bbm bbo bbr bbs bca bcb bcc bcm bco bcr bcs bma bmb bmc bmm bmo bmr bms boa bob boc bom boo bor bos bra brb brm bro brr brs bsa bsb bsc bsm bso bsr bss c-- caa cab cac cam cao car cas cba cbb cbc cbm cbo cbr cbs cca ccb ccc ccm cco ccr ccs cma cmb cmc cmm cmo cmr cms co- coa cob coc com coo cor cos cra crb crc crm cro crr crs csa csb csc csm cso csr css m-o m-r maa mab mac mam mao mar mas mba mbb mbc mbm mbo mbr mbs mc- mca mcb mcc mcm mco mcr mcs mma mmb mmc mmm mmo mmr mms moa mob moc mom moo mor mos mra mrb mrc mrm mro mrr mrs msa msb msc msm mso msr mss oaa oab oac oam oao oar oas ob- oba obb obc obm obo obr obs oc- oca ocb occ ocm oco ocr ocs om- oma omb omc omm omo omr oms oo- ooa oob ooc oom ooo oor oos or- ora orb orc orm oro orr ors os- osa osb osc osm oso osr oss ra- raa rab rac ram rao rar ras rba rbb rbc rbm rbo rbr rbs rca rcb rcc rcm rco rcr rcs rma rmb rmc rmm rmo rmr rms roa rob roc rom roo ror ros rra rrb rrc rrm rrr rrs rsa rsb rsc rsm rso rsr rss saa sab sac sam sao sar sas sba sbb sbc sbm sbo sbr sbs sca scb scc scm sco scr scs sma smb smc smm smo smr sms soa sob soc som soo sor sos sr- sra srb src srm sro srr srs ss- ssa ssb ssc ssm sso ssr sss

aaaa aaab aaac aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aacm aaco aacr aacs aama aamb aamc aamo aamr aams aaoo aara aarc aarm aaro aars aasa aasc aasm aass abaa abab abac abam abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abcr abcs abma abmb abmc abms aboa abob aboo abor abos abra abrc abro abrs abs- absa abss acaa acab acac acar acas acba acca accc accm acco accs acma acmc acms acoa acom acor acos acr- acra acrc acrm acro acrr acrs acsa acsc acsm acss amaa amac amam amar amas amb- amba ambo ambr ambs amca amcc amco amcs amm- amma ammo amob amoc amoo amor amos amra amrc amro amsa amsc amso amss aoba aoca aocs aoma aora aorb aors aoss arab arac aram arar aras arba arbs arc- arca arcm arco arcs arma armc armm armo arms aroa arob arom aroo aror aros arr- arra arrc arro arrr arrs ars- arsa arsc arso asaa asab asac asam asao asar asas asba asbm asbo asc- asca ascb ascc asco ascr asma asmm asmr asms asob asoc asom asor asos asra asrc asrm asro asrs assa assc asso assr asss baaa baam baar baas baba babb babm babo babr babs bac- baca bacc baco bacs bama bamb bamc bamm bams baos bar- bara barb barc barm baro barr bars basa basc baso bass bbas bbbb bbbs bbcm bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcor bcos bcra bcrs bcsa bcsc bcsm bcss bmaa bmoc boab boac boar boas boba bobb bobo bobs boca bocm boco bocs boma bomb boms boob booc boom boor boos bor- bora borm boro borr bors bosa bosc bosm boso boss brab brac bram brao bras brca brcb brmc broa brob broc brom broo bror bros brrm brrr brrs brsb brsr bsaa bsac bsam bsas bscs bsms bsos bsra bsrm bssc bssm c-bo caaa caab caac caam caas caba cabo cabs 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 cbac cbar cbbc cbbs cbca cbcc cbcm cbcr cbcs cbms cbrm cbsa cbsc cbsm ccaa ccab ccac ccam ccar ccas ccba ccbc ccca cccb cccc cccm cccs ccma ccmb ccmc ccmm ccms ccob ccoc ccom ccra ccrc ccrs ccsa ccss cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmmb cmmc cmms cmoc cmos cmra cmrr cmrs cmsa cmsc coas coba cobb cobo cobs coca coco com- coma comb comc comm como comr coms coob coom coos cor- cora corb corc corm coro corr cors cosa cosc cosm coso coss crab crac cram crar cras crbc crca crcc crcr crmb crmo crms crob croc crom croo cror crsa crss csaa csab csac csao csar csas csbm cscb cscc csco cscr cscs csma csmc csob csom csor csos csra csrc csrs cssa cssm cssr maaa maac maam maar maas maba mabo mabs mac- maca macb macc maco macr macs mama mamc mamo mams maoc maor maos mar- mara marc marm maro marr mars masa masc masr mass mbac mbam mbas mbba mbbs mbca mbcs mbms mbrs mcaa mcac mcas mcba mcbc mcca mccc mcmc mcrc mcsa mcss mmaa mmab mmac mmar mmas mmcc mmcm mmcs mmmc mmmm mmms mmor mmrc mmsc moaa moab moac moam moar moas moba mobb mobo mobs moca moco mocs moma momo moms mooa moob mooc moor moos mora morb moro mors mosa mosc moso moss mr-c mrac mras mrbb mrbm mrbs mrca mrcb mrcc mrcs mrmc mrrc mrsa mrsc msaa msar msas msba msca mscc msco msma msmb msmc msmm msms msoa msor msra msrb mssa mssm mssr oama oams oara oars oasc oass obas obba obbo obor obos obra obro obsr obss ocab ocac ocam