a-a a-b a-c aaa aab aac aah aam aao aar aas ab- aba abb abc abh abm abo abr abs ac- aca acb acc ach acm aco acr acs aha ahb ahc ahh ahm aho ahr ahs ama amb amc amh amm amo amr ams aoa aob aoc aoh aom aoo aor aos ar- ara arb arc arh arm aro arr ars as- asa asb asc ash asm aso asr ass baa bab bac bah bam bao bar bas bba bbb bbc bbh bbm bbo bbr bbs bca bcb bcc bch bcm bco bcr bcs bha bhb bhc bhh bhm bho bhr bhs bma bmb bmc bmh bmm bmo bmr bms boa bob boc boh bom boo bor bos bra brb brh brm bro brr brs bsa bsb bsc bsh bsm bso bsr bss c-- caa cab cac cah cam cao car cas cba cbb cbc cbh cbm cbo cbr cbs cca ccb ccc cch ccm cco ccr ccs ch- cha chb chc chh chm cho chr chs cma cmb cmc cmh cmm cmo cmr cms co- coa cob coc coh com coo cor cos cra crb crc crh crm cro crr crs csa csb csc csh csm cso csr css haa hab hac hah ham hao har has hba hbb hbc hbh hbm hbo hbr hbs hca hcb hcc hch hcm hco hcr hcs hha hhb hhc hhh hhm hho hhr hhs hma hmb hmc hmh hmm hmo hmr hms hoa hob hoc hoh hom hoo hor hos hr- hra hrb hrc hrh hrm hro hrr hrs hsa hsb hsc hsh hsm hsr hss m-o m-r maa mab mac mah mam mao mar mas mba mbb mbc mbh mbm mbo mbr mbs mc- mca mcb mcc mch mcm mco mcr mcs mha mhc mhh mhm mho mhr mhs mma mmb mmc mmh mmm mmo mmr mms moa mob moc moh mom moo mor mos mra mrb mrc mrh mrm mro mrr mrs msa msb msc msh msm mso msr mss oaa oab oac oah oam oao oar oas ob- oba obb obc obh obm obo obr obs oc- oca ocb occ och ocm oco ocr ocs oha ohc ohh ohm oho ohr ohs om- oma omb omc omh omm omo omr oms oo- ooa oob ooc ooh oom ooo oor oos or- ora orb orc orh orm oro orr ors os- osa osb osc osh osm oso osr oss ra- raa rab rac rah ram rao rar ras rba rbb rbc rbh rbm rbo rbr rbs rca rcb rcc rch rcm rco rcr rcs rh- rha rhb rhc rhh rhm rho rhr rhs rma rmb rmc rmh rmm rmo rmr rms roa rob roc roh rom roo ror ros rra rrb rrc rrh rrm rrr rrs rsa rsb rsc rsh rsm rso rsr rss saa sab sac sah sam sao sar sas sba sbb sbc sbh sbm sbo sbr sbs sca scb scc sch scm sco scr scs sh- sha shb shc shh shm sho shr shs sma smb smc smh smm smo smr sms soa sob soc soh som soo sor sos sr- sra srb src srh srm sro srr srs ss- ssa ssb ssc ssh ssm sso ssr sss