-er a-a a-b a-c a-t aaa aab aac aae aag aam aao aar aas aat ab- aba abb abc abe abg abm abo abr abs abt ac- aca acb acc ace acg acm aco acr acs act aea aeb aec aee aeg aem aeo aer aes aet ag- aga agb agc age agg agm ago agr ags agt ama amb amc ame amg amm amo amr ams amt aoa aob aoc aoe aog aom aoo aor aos aot ar- ara arb arc are arg arm aro arr ars art as- asa asb asc ase asg asm aso asr ass ast at- ata atb atc ate atg atm ato atr ats att baa bab bac bae bag bam bao bar bas bat bba bbb bbc bbe bbg bbm bbo bbr bbs bbt bca bcb bcc bce bcg bcm bco bcr bcs bct be- bea beb bec bee beg bem beo ber bes bet bga bgb bgc bge bgg bgm bgo bgr bgs bgt bma bmb bmc bme bmg bmm bmo bmr bms bmt boa bob boc boe bog bom boo bor bos bot bra brb bre brg brm bro brr brs brt bsa bsb bsc bse bsg bsm bso bsr bss bst bta btb btc bte btg btm bto btr bts btt c-- caa cab cac cae cag cam cao car cas cat cba cbb cbc cbe cbg cbm cbo cbr cbs cbt cca ccb ccc cce ccg ccm cco ccr ccs cct ce- cea ceb cec cee ceg cem ceo cer ces cet cga cgb cgc cge cgg cgm cgo cgr cgs cgt cma cmb cmc cme cmg cmm cmo cmr cms cmt co- coa cob coc coe cog com coo cor cos cot cra crb crc cre crg crm cro crr crs crt csa csb csc cse csg csm cso csr css cst cta ctb ctc cte ctg ctm cto ctr cts ctt eaa eab eac eae eag eam eao ear eas eat eba ebb ebc ebe ebg ebm ebo ebr ebs ebt ec- eca ecb ecc ece ecg ecm eco ecr ecs ect eea eeb eec eee eeg eem eeo eer ees eet ega egb egc ege egg egm ego egr egs egt em- ema emb emc eme emg emm emo emr ems emt eo- eoa eob eoc eoe eog eom eoo eor eos eot era erb erc ere erg erm ero err ers ert es- esa esb esc ese esg esm eso esr ess est eta etb etc ete etg etm eto etr ets ett gaa gab gac gae gag gam gao gar gas gat gba gbc gbe gbg gbm gbo gbr gbs gbt gca gcb gcc gce gcg gcm gco gcr gcs gct ge- gea geb gec gee geg gem geo ger ges get gga ggb ggc ggg ggm ggo ggr ggs ggt gma gmb gmc gme gmg gmm gmo gmr gms gmt goa gob goc goe gog gom goo gor gos got gra grb grc gre grg grm gro grr grs grt gsa gsb gsc gse gsg gsm gso gsr gss gst gta gtb gtc gte gtg gtm gto gtr gts gtt m-o m-r maa mab mac mae mag mam mao mar mas mat mba mbb mbc mbe mbg mbm mbo mbr mbs mbt mc- mca mcb mcc mce mcg mcm mco mcr mcs mct mea meb mec mee meg mem meo mer mes met mga mgb mgc mge mgm mgo mgr mgs mgt mma mmb mmc mme mmg mmm mmo mmr mms mmt moa mob moc moe mog mom moo mor mos mot mra mrb mrc mre mrg mrm mro mrr mrs mrt msa msb msc mse msg msm mso msr mss mst mta mtb mtc mte mtg mtm mto mtr mts mtt oaa oab oac oae oag oam oao oar oas oat ob- oba obb obc obe obg obm obo obr obs obt oc- oca ocb occ ocg ocm oco ocr ocs oct oea oeb oec oee oeg oem oeo oer oes oet oga ogc oge ogg ogo ogs ogt om- oma omb omc ome omg omm omo omr oms omt oo- ooa oob ooc oog oom ooo oor oos oot or- ora orb orc ore org orm oro orr ors ort os- osa osb osc ose osg osm oso osr oss ost ot- ota otb otc ote otg otm oto otr ots ott ra- raa rab rac rae rag ram rao rar ras rat rba rbb rbc rbe rbg rbm rbo rbr rbs rbt rca rcb rcc rce rcg rcm rco rcr rcs rct re- rea reb rec ree reg rem reo rer res ret rga rgb rgc rge rgg rgo rgr rgs rgt rma rmb rmc rme rmg rmm rmo rmr rms rmt roa rob roc roe rog rom roo ror ros rot rra rrb rrc rrg rrm rrr rrs rrt rsa rsb rsc rse rsg rsm rso rsr rss rst rta rtb rtc rte rtg rtm rto rtr rts rtt saa sab sac sae sag sam sao sar sas sat sba sbb sbc sbe sbg sbm sbo sbr sbs sbt sca scb scc sce scg scm sco scr scs sct se- sea seb sec see seg sem seo ser ses set sga sgb sgc sge sgg sgm sgo sgr sgs sgt sma smb smc sme smg smm smo smr sms smt soa sob soc soe sog som soo sor sos sot sr- sra srb src sre srg srm sro srr srs srt ss- ssa ssb ssc sse ssg ssm sso ssr sss sst sta stb stc ste stg stm sto str sts stt taa tab tac tae tag tam tao tar tas tat tba tbb tbc tbe tbg tbm tbo tbr tbs tbt tca tcb tcc tce tcg tcm tco tcr tcs tct te- tea teb tec tee teg tem teo ter tes tet tga tgb tgc tge tgg tgm tgo tgr tgs tgt tma tmb tmc tme tmg tmm tmo tmr tms tmt to- toa tob toc toe tog tom too tor tos tot tra trb trc tre trg