-er a-a a-b aaa aab aae aaj aam aao aar aas ab- aba abb abe abj abm abo abr abs aea aeb aee aej aem aeo aer aes aja ajb aje ajj ajm ajo ajr ajs ama amb ame amm amo amr ams aoa aob aoe aoj aom aoo aor aos ar- ara arb are arj arm aro arr ars as- asa asb ase asj asm aso asr ass baa bab bae baj bam bao bar bas bba bbb bbe bbm bbo bbr bbs be- bea beb bee bem beo ber bes bja bjj bjm bjr bjs bma bmb bme bmj bmm bmo bmr bms boa bob boe boj bom boo bor bos bra brb bre brj brm bro brr brs bsa bsb bse bsj bsm bso bsr bss eaa eab eae eaj eam eao ear eas eba ebb ebe ebj ebm ebo ebr ebs eea eeb eee eem eeo eer ees eja ejo em- ema emb eme emm emo emr ems eo- eoa eob eoe eom eoo eor eos era erb ere erm ero err ers es- esa esb ese esm eso esr ess jaa jab jae jaj jam jao jar jas jba jbj jbm jbo jbr jbs jea jeb jee jej jem jeo jer jes jja jjb jjj jjr jjs jma jmb jme jmj jmm jmo jmr jms joa job joe joj jom joo jor jos jra jrb jrm jro jrr jrs jsa jsb jse jsj jsm jso jsr jss m-o m-r maa mab mae maj mam mao mar mas mba mbb mbe mbj mbm mbo mbr mbs mea meb mee mej mem meo mer mes mjb mje mjj mjm mjr mjs mma mmb mme mmj mmm mmo mmr mms moa mob moe mom moo mor mos mra mrb mre mrj mrm mro mrr mrs msa msb mse msj msm mso msr mss oaa oab oae oaj oam oao oar oas ob- oba obb obe obj obm obo obr obs oea oeb oee oem oeo oer oes oja ojb oje ojm ojo ojs om- oma omb ome omj omm omo omr oms oo- ooa oob oom ooo oor oos or- ora orb ore orm oro orr ors os- osa osb ose osj osm oso osr oss ra- raa rab rae raj ram rao rar ras rba rbb rbe rbm rbo rbr rbs re- rea reb ree rem reo rer res rja rjm rjr rma rmb rme rmm rmo rmr rms roa rob roe roj rom roo ror ros rra rrb rrm rrr rrs rsa rsb rse rsj rsm rso rsr rss saa sab sae saj sam sao sar sas sba sbb sbe sbj sbm sbo sbr sbs se- sea seb see sej sem seo ser ses sja sjb sje sjj sjm sjr sjs sma smb sme smm smo smr sms soa sob soe soj som soo sor sos sr- sra srb sre srj srm sro srr srs ss- ssa ssb sse ssj ssm sso ssr sss