-er a-a a-b a-c aaa aab aac aae aag aam aao aap aar aas ab- aba abb abc abe abg abm abo abp abr abs ac- aca acb acc ace acg acm aco acp acr acs aea aeb aec aee aeg aem aeo aep aer aes ag- aga agb agc age agg agm ago agp agr ags ama amb amc ame amg amm amo amp amr ams aoa aob aoc aoe aog aom aoo aop aor aos ap- apa apb apc ape apg apm apo app apr aps ar- ara arb arc are arg arm aro arp arr ars as- asa asb asc ase asg asm aso asp asr ass b-p baa bab bac bae bag bam bao bap bar bas bba bbb bbc bbe bbg bbm bbo bbp bbr bbs bca bcb bcc bce bcg bcm bco bcp bcr bcs be- bea beb bec bee beg bem beo bep ber bes bga bgb bgc bge bgg bgm bgo bgp bgr bgs bma bmb bmc bme bmg bmm bmo bmp bmr bms boa bob boc boe bog bom boo bop bor bos bpa bpb bpc bpe bpg bpm bpo bpp bpr bps bra brb bre brg brm bro brp brr brs bsa bsb bsc bse bsg bsm bso bsp bsr bss c-- caa cab cac cae cag cam cao cap car cas cba cbb cbc cbe cbg cbm cbo cbp cbr cbs cca ccb ccc cce ccg ccm cco ccp ccr ccs ce- cea ceb cec cee ceg cem ceo cep cer ces cga cgb cgc cge cgg cgm cgo cgp cgr cgs cma cmb cmc cme cmg cmm cmo cmp cmr cms co- coa cob coc coe cog com coo cop cor cos cpa cpb cpc cpe cpg cpm cpo cpp cpr cps cra crb crc cre crg crm cro crp crr crs csa csb csc cse csg csm cso csp csr css eaa eab eac eae eag eam eao eap ear eas eba ebb ebc ebe ebg ebm ebo ebp ebr ebs ec- eca ecb ecc ece ecg ecm eco ecr ecs eea eeb eec eee eeg eem eeo eep eer ees ega egb egc ege egg egm ego egp egr egs em- ema emb emc eme emg emm emo emp emr ems eo- eoa eob eoc eoe eog eom eoo eop eor eos ep- epa epb epc epe epg epm epo epp epr eps era erb erc ere erg erm ero erp err ers es- esa esb esc ese esg esm eso esp esr ess g-p gaa gab gac gae gag gam gao gap gar gas gba gbc gbe gbg gbm gbo gbp gbr gbs gca gcb gcc gce gcg gcm gco gcp gcr gcs ge- gea geb gec gee geg gem geo gep ger ges gga ggb ggc ggg ggm ggo ggp ggr ggs gma gmb gmc gme gmg gmm gmo gmp gmr gms goa gob goc goe gog gom goo gop gor gos gpa gpb gpc gpe gpg gpm gpo gpp gpr gps gra grb grc gre grg grm gro grp grr grs gsa gsb gsc gse gsg gsm gso gsp gsr gss m-o m-r maa mab mac mae mag mam mao map mar mas mba mbb mbc mbe mbg mbm mbo mbp mbr mbs mc- mca mcb mcc mce mcg mcm mco mcp mcr mcs mea meb mec mee meg mem meo mep mer mes mga mgb mgc mge mgm mgo mgp mgr mgs mma mmb mmc mme mmg mmm mmo mmp mmr mms moa mob moc moe mog mom moo mop mor mos mpa mpb mpc mpe mpg mpm mpo mpp mpr mps mra mrb mrc mre mrg mrm mro mrp mrr mrs msa msb msc mse msg msm mso msp msr mss oaa oab oac oae oag oam oao oap oar oas ob- oba obb obc obe obg obm obo obp obr obs oc- oca ocb occ ocg ocm oco ocp ocr ocs oea oeb oec oee oeg oem oeo oep oer oes oga ogc oge ogg ogo ogp ogs om- oma omb omc ome omg omm omo omp omr oms oo- ooa oob ooc oog oom ooo oop oor oos op- opa opb opc ope opg opm opo opp opr ops or- ora orb orc ore org orm oro orp orr ors os- osa osb osc ose osg osm oso osp osr oss p-p paa pab pac pae pag pam pao pap par pas pba pbb pbc pbe pbg pbm pbo pbp pbr pbs pca pcb pcc pce pcg pcm pco pcp pcr pcs pea peb pec pee peg pem peo pep per pes pga pgb pgc pge pgg pgm pgo pgp pgr pgs pma pmb pmc pme pmg pmm pmo pmp pmr pms poa pob poc poe pog pom poo pop por pos ppa ppb ppc ppe ppg ppm ppo ppp ppr pps pra prb prc pre prg prm pro prp prr prs ps- psa psb psc pse psg psm pso psp psr pss ra- raa rab rac rae rag ram rao rap rar ras rba rbb rbc rbe rbg rbm rbo rbp rbr rbs rca rcb rcc rce rcg rcm rco rcp rcr rcs re- rea reb rec ree reg rem reo rep rer res rga rgb rgc rge rgg rgo rgp rgr rgs rma rmb rmc rme rmg rmm rmo rmp rmr rms roa rob roc roe rog rom roo rop ror ros rpa rpb rpc rpe rpg rpm rpo rpp rpr rps rra rrb rrc rrg rrm rrp rrr rrs rsa rsb rsc rse rsg rsm rso rsp rsr rss saa sab sac sae sag sam sao sap sar sas sba sbb sbc sbe sbg sbm sbo sbp sbr sbs sca scb scc sce scg scm sco scp scr scs se- sea seb sec see seg sem seo sep ser ses sga sgb sgc sge sgg sgm sgo sgp sgr sgs sma smb smc sme smg smm smo smp smr sms soa sob soc soe sog som soo sop sor sos spa spb spc spe spg spm