-er a-a a-c aaa aac aae aaf aag aam aan aao aar ac- aca acc ace acf acg acm acn aco acr aea aec aee aef aeg aem aen aeo aer af- afa afc afe aff afg afm afn afo afr ag- aga agc age agf agg agm agn ago agr ama amc ame amf amg amm amn amo amr an- ana anc ane anf ang anm ann ano anr aoa aoc aoe aof aog aom aon aoo aor ar- ara arc are arf arg arm arn aro arr c-- caa cac cae caf cag cam can cao car cca ccc cce ccf ccg ccm ccn cco ccr ce- cea cec cee cef ceg cem cen ceo cer cfa cfc cfe cff cfg cfm cfn cfo cfr cga cgc cge cgg cgm cgn cgo cgr cma cmc cme cmf cmg cmm cmn cmo cmr cn- cna cnc cne cnf cng cnm cnn cno cnr co- coa coc coe cof cog com con coo cor cra crc cre crf crg crm crn cro crr eaa eac eae eaf eag eam ean eao ear ec- eca ecc ece ecf ecg ecm ecn eco ecr eea eec eee eef eeg eem een eeo eer ef- efa efc efe eff efg efm efo efr ega egc ege egf egg egm egn ego egr em- ema emc eme emf emg emm emn emo emr en- ena enc ene enf eng enm enn eno enr eo- eoa eoc eoe eof eog eom eon eoo eor era erc ere erf erg erm ern ero err faa fac fae faf fag fam fan fao far fca fcc fce fcf fcg fcm fcn fco fcr fea fec fee fef feg fem fen feo fer ffa ffc ffe fff ffg ffm ffn ffo ffr fga fgc fge fgf fgg fgm fgn fgr fma fmc fme fmf fmg fmm fmn fmo fmr fna fnc fne fnf fng fnm fnn fnr foa foc foe fof fog fom fon foo for fra frc fre frf frg frm frn fro frr gaa gac gae gaf gag gam gan gao gar gca gcc gce gcf gcg gcm gcn gco gcr ge- gea gec gee gef geg gem gen geo ger gfa gfc gfe gff gfm gfo gfr gga ggc ggg ggm ggn ggo ggr gma gmc gme gmf gmg gmm gmn gmo gmr gna gnc gne gnf gnm gnn gno gnr goa goc goe gof gog gom gon goo gor gra grc gre grf grg grm grn gro grr m-f m-o m-r maa mac mae maf mag mam man mao mar mc- mca mcc mce mcf mcg mcm mcn mco mcr mea mec mee mef meg mem men meo mer mfa mfc mfe mff mfg mfm mfn mfo mfr mga mgc mge mgf mgm mgn mgo mgr mma mmc mme mmf mmg mmm mmn mmo mmr mna mnc mne mnf mng mnm mnn mno mnr moa moc moe mof mog mom mon moo mor mra mrc mre mrf mrg mrm mrn mro mrr naa nac nae naf nag nam nan nao nar nca ncc nce ncf ncg ncm ncn nco ncr ne- nea nec nee nef neg nem nen neo ner nfa nfc nfe nff nfn nfo nfr nga ngc nge ngf ngg ngm ngn ngo nma nmc nme nmg nmm nmn nmo nmr nna nnc nne nnf nng nnm nnn nno no- noa noc noe nof nog nom non noo nor nra nrc nre nrf nrg nrm nrn nro nrr oaa oac oae oaf oag oam oan oao oar oc- oca occ ocf ocg ocm ocn oco ocr oea oec oee oef oeg oem oen oeo oer of- ofa ofc ofe off ofg ofm ofn ofo ofr oga ogc oge ogf ogg ogn ogo om- oma omc ome omf omg omm omn omo omr on- ona onc one onf ong onn ono onr oo- ooa ooc oof oog oom oon ooo oor or- ora orc ore orf org orm orn oro orr ra- raa rac rae raf rag ram ran rao rar rca rcc rce rcf rcg rcm rcn rco rcr re- rea rec ree ref reg rem ren reo rer rfa rfc rfe rff rfg rfm rfn rfo rfr rga rgc rge rgf rgg rgn rgo rgr rma rmc rme rmf rmg rmm rmn rmo rmr rna rnc rng rnm rnn rno rnr roa roc roe rof rog rom ron roo ror rra rrc rrf rrg rrm rrn rrr