-er a-a a-b aaa aab aae aah aam aao aar aas ab- aba abb abe abh abm abo abr abs aea aeb aee aeh aem aeo aer aes aha ahb ahe ahh ahm aho ahr ahs ama amb ame amh amm amo amr ams aoa aob aoe aoh aom aoo aor aos ar- ara arb are arh arm aro arr ars as- asa asb ase ash asm aso asr ass baa bab bae bah bam bao bar bas bba bbb bbe bbh bbm bbo bbr bbs be- bea beb bee beh bem beo ber bes bha bhb bhe bhh bhm bho bhr bhs bma bmb bme bmh bmm bmo bmr bms boa bob boe boh bom boo bor bos bra brb bre brh brm bro brr brs bsa bsb bse bsh bsm bso bsr bss eaa eab eae eah eam eao ear eas eba ebb ebe ebh ebm ebo ebr ebs eea eeb eee eem eeo eer ees eha ehb ehe ehh ehm eho ehr ehs em- ema emb eme emh emm emo emr ems eo- eoa eob eoe eoh eom eoo eor eos era erb ere erh erm ero err ers es- esa esb ese esh esm eso esr ess haa hab hae hah ham hao har has hba hbb hbe hbh hbm hbo hbr hbs he- hea heb hee heh hem heo her hes hha hhb hhe hhh hhm hho hhr hhs hma hmb hme hmh hmm hmo hmr hms hoa hob hoe hoh hom hoo hor hos hr- hra hrb hre hrh hrm hro hrr hrs hsa hsb hse hsh hsm hsr hss m-o m-r maa mab mae mah mam mao mar mas mba mbb mbe mbh mbm mbo mbr mbs mea meb mee meh mem meo mer mes mha mhh mhm mho mhr mhs mma mmb mme mmh mmm mmo mmr mms moa mob moe moh mom moo mor mos mra mrb mre mrh mrm mro mrr mrs msa msb mse msh msm mso msr mss oaa oab oae oah oam oao oar oas ob- oba obb obe obh obm obo obr obs oea oeb oee oeh oem oeo oer oes oha ohe ohh ohm oho ohr ohs om- oma omb ome omh omm omo omr oms oo- ooa oob ooh oom ooo oor oos or- ora orb ore orh orm oro orr ors os- osa osb ose osh osm oso osr oss ra- raa rab rae rah ram rao rar ras rba rbb rbe rbh rbm rbo rbr rbs re- rea reb ree reh rem reo rer res rh- rha rhb rhe rhh rhm rho rhr rhs rma rmb rme rmh rmm rmo rmr rms roa rob roe roh rom roo ror ros rra rrb rrh rrm rrr rrs rsa rsb rse rsh rsm rso rsr rss saa sab sae sah sam sao sar sas sba sbb sbe sbh sbm sbo sbr sbs se- sea seb see seh sem seo ser ses sh- sha shb she shh shm sho shr shs sma smb sme smh smm smo smr sms soa sob soe soh som soo sor sos sr- sra srb sre srh srm sro srr srs ss- ssa ssb sse ssh ssm sso ssr sss