a-a a-b a-c aaa aab aac aah aao aap aar aas ab- aba abb abc abh abo abp abr abs ac- aca acb acc ach aco acp acr acs aha ahb ahc ahh aho ahp ahr ahs aoa aob aoc aoh aoo aop aor aos ap- apa apb apc aph apo app apr aps ar- ara arb arc arh aro arp arr ars as- asa asb asc ash aso asp asr ass b-p baa bab bac bah bao bap bar bas bba bbb bbc bbh bbo bbp bbr bbs bca bcb bcc bch bco bcp bcr bcs bha bhb bhc bhh bho bhp bhr bhs boa bob boc boh boo bop bor bos bpa bpb bpc bph bpo bpp bpr bps bra brb brh bro brp brr brs bsa bsb bsc bsh bso bsp bsr bss c-- caa cab cac cah cao cap car cas cba cbb cbc cbh cbo cbp cbr cbs cca ccb ccc cch cco ccp ccr ccs ch- cha chb chc chh cho chp chr chs co- coa cob coc coh coo cop cor cos cpa cpb cpc cph cpo cpp cpr cps cra crb crc crh cro crp crr crs csa csb csc csh cso csp csr css haa hab hac hah hao hap har has hba hbb hbc hbh hbo hbp hbr hbs hca hcb hcc hch hco hcp hcr hcs hha hhb hhc hhh hho hhp hhr hhs hoa hob hoc hoh hoo hop hor hos hpa hpb hpc hph hpo hpp hpr hps hr- hra hrb hrc hrh hro hrp hrr hrs hsa hsb hsc hsh hsp hsr hss oaa oab oac oah oao oap oar oas ob- oba obb obc obh obo obp obr obs oc- oca ocb occ och oco ocp ocr ocs oha ohc ohh oho ohp ohr ohs oo- ooa oob ooc ooh ooo oop oor oos op- opa opb opc oph opo opp opr ops or- ora orb orc orh oro orp orr ors os- osa osb osc osh oso osp osr oss p-p paa pab pac pah pao pap par pas pba pbb pbc pbo pbp pbr pbs pca pcb pcc pch pco pcp pcr pcs pha phb phc pho php phr phs poa pob poc poh poo pop por pos ppa ppb ppc pph ppo ppp ppr pps pra prb prc prh pro prp prr prs ps- psa psb psc psh pso psp psr pss ra- raa rab rac rah rao rap rar ras rba rbb rbc rbh rbo rbp rbr rbs rca rcb rcc rch rco rcp rcr rcs rh- rha rhb rhc rhh rho rhp rhr rhs roa rob roc roh roo rop ror ros rpa rpb rpc rph rpo rpp rpr rps rra rrb rrc rrh rrp rrr rrs rsa rsb rsc rsh rso rsp rsr rss saa sab sac sah sao sap sar sas sba sbb sbc sbh sbo sbp sbr sbs sca scb scc sch sco scp scr scs sh- sha shb shc shh sho shp shr shs soa sob soc soh soo sop sor sos spa spb spc sph spo spp spr sps sr- sra srb src srh sro srp srr srs ss- ssa ssb ssc ssh sso ssp ssr sss

a-ha aaaa aaab aaac aaah aaap aaar aaas aaba aabb aabc aabh aabp aaca aacb aacc aach aaco aacp aacr aacs aaha aahs aaoo aapa aapc aaph aapo aaps aara aarc aaro aarp aars aasa aasc aass abaa abab abac abap abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abch abcp abcr abcs abha abho abhr abhs aboa abob aboh aboo abor abos abpa abpc abpp abpr abps abra abrc abro abrs abs- absa absp abss acaa acab acac acap acar acas acba acca accc acch acco accp accs acha achh acho achp achr achs acoa acoh acop acor acos acpa acpr acps acr- acra acrc acro acrr acrs acsa acsc acss ahab ahac ahah ahar ahas ahha ahhs ahoa ahop ahor ahra ahrc ahrr ahrs ahsa ahso ahss aoah aoba aoca aocs aopo aora aorb aors aosp aoss apac apah apao apap apar apas apba apbr apbs apca apcb apcc apco apcr apcs aph- apha aphc aphs apo- apoc apoo apop apor apos appa appc apph appr apps apra aprc apro aprs apsa apso apss arab arac arah arap arar aras arba arbh arbs arc- arca arch arco arcs arh- arhs aroa arob aroo aror aros arpa arps arr- arra arrc arrh arro arrr arrs ars- arsa arsc arso asaa asab asac asah asao asap asar asas asba asbo asc- asca ascb ascc asch asco ascp ascr asha ashp ashs asob asoc asop asor asos aspa aspc asph aspo aspr asps asra asrc asro asrs assa assc assh asso assp assr asss baaa baah baar baas baba babb babo babr babs bac- baca bacc bach baco bacs baha baho bahr bahs baoh baos bapa bapc bapp baps bar- bara barb barc barh baro barr bars basa basc bash baso bass bbas bbbb bbbs bbch bbhs bbpr bbrc bcaa bcap bcar bcas bcbc bcbp bcbs bcca bccc bccs bchs bcor bcos bcpp bcps bcra bcrs bcsa bcsc bcss bhao bhar bhca bhcc bhhs bhor bhra boab boac boar boas boba bobb bobo bobs boca boch boco bocs boha boho bohr bohs boob booc booh boop boor boos bopa bopp bops bor- bora borh boro borr bors bosa bosc bosh boso boss bpcp bphc bphs bprc bpsa brab brac brah brao bras brca brcb brhs broa brob broc broh broo bror bros brrr brrs brsb brsr bsaa bsac bsap bsas bscp bscs bshs bsos bspp bspr bsra bssc c-bo caaa caab caac caah caap caas caba cabo cabs cac- caca cacc cach caco cacr caha cahs caor caos capa capb capc caph capo capp caps cara carb carc caro carp carr cars casa casb casc cash caso casp casr cass cbac cbar cbbc cbbs cbca cbcc cbcp cbcr cbcs cbha cbhs cbpc cbpp cbrh cbsa cbsc ccaa ccab ccac ccap ccar ccas ccba ccbc ccca cccb