-er a-a a-c aaa aac aad aae aaf aag aan aao aar ac- aca acc acd ace acf acg acn aco acr ad- ada adc add ade adf adg adn ado adr aea aec aed aee aef aeg aen aeo aer af- afa afc afd afe aff afg afn afo afr ag- aga agc agd age agf agg agn ago agr an- ana anc and ane anf ang ann ano anr aoa aoc aod aoe aof aog aon aoo aor ar- ara arc ard are arf arg arn aro arr c-- caa cac cad cae caf cag can cao car cca ccc ccd cce ccf ccg ccn cco ccr cda cdc cdd cde cdf cdg cdn cdo cdr ce- cea cec ced cee cef ceg cen ceo cer cfa cfc cfd cfe cff cfg cfn cfo cfr cga cgc cgd cge cgg cgn cgo cgr cn- cna cnc cnd cne cnf cng cnn cno cnr co- coa coc cod coe cof cog con coo cor cra crc crd cre crf crg crn cro crr daa dac dad dae daf dag dan dao dar dca dcc dcd dce dcf dcg dcn dco dcr dda ddc ddd dde ddf ddg ddn ddo ddr de- dea dec ded dee def deg den deo der dfa dfc dfd dfe dff dfg dfn dfo dfr dga dgc dgd dge dgf dgg dgn dgr dna dnc dnd dne dnf dng dnn dno dnr doa doc dod doe dof dog don doo dor dra drc drd dre drg drn dro drr eaa eac ead eae eaf eag ean eao ear ec- eca ecc ecd ece ecf ecg ecn eco ecr ed- eda edc edd ede edf edg edn edo edr eea eec eed eee eef eeg een eeo eer ef- efa efc efd efe eff efg efo efr ega egc egd ege egf egg egn ego egr en- ena enc end ene enf eng enn eno enr eo- eoa eoc eod eoe eof eog eon eoo eor era erc erd ere erf erg ern ero err faa fac fad fae faf fag fan fao far fca fcc fcd fce fcf fcg fcn fco fcr fda fdc fdd fde fdf fdg fdn fdo fdr fea fec fed fee fef feg fen feo fer ffa ffc ffd ffe fff ffg ffn ffo ffr fga fgc fgd fge fgf fgg fgn fgr fna fnc fnd fne fnf fng fnn fnr foa foc foe fof fog fon foo for fra frc frd fre frf frg frn fro frr g-d gaa gac gad gae gaf gag gan gao gar gca gcc gcd gce gcf gcg gcn gco gcr gda gdc gdd gde gdf gdn gdo gdr ge- gea gec ged gee gef geg gen geo ger gfa gfc gfd gfe gff gfo gfr gga ggc ggd ggg ggn ggo ggr gna gnc gnd gne gnf gnn gno gnr goa goc god goe gof gog gon goo gor gra grc grd gre grf grg grn gro grr naa nac nad nae naf nag nan nao nar nca ncc ncd nce ncf ncg ncn nco ncr nda ndc ndd nde ndf ndg ndn ndo ndr ne- nea nec ned nee nef neg nen neo ner nfa nfc nfd nfe nff nfn nfo nfr nga ngc ngd nge ngf ngg ngn ngo nna nnc nne nnf nng nnn nno no- noa noc nod noe nof nog non noo nor nra nrc nrd nre nrf nrg nrn nro nrr oaa oac oad oae oaf oag oan oao oar oc- oca occ ocd ocf ocg ocn oco ocr oda odc odd ode odf odg odn odo odr oea oec oed oee oef oeg oen oeo oer of- ofa ofc ofd ofe off ofg ofn ofo ofr oga ogc ogd oge ogf ogg ogn ogo on- ona onc ond one onf ong onn ono onr oo- ooa ooc ood oof oog oon ooo oor or- ora orc ord ore orf org orn oro orr ra- raa rac rad rae raf rag ran rao rar rca rcc rcd rce rcf rcg rcn rco rcr rda rdc rdd rde rdf rdg rdn rdo rdr re- rea rec red ree ref reg ren reo rer rfa rfc rfd rfe rff rfg rfn rfo rfr rga rgc rgd rge rgf rgg rgn rgo rgr rna rnc rnd rng rnn rno rnr roa roc rod roe rof rog ron roo ror rra rrc rrd rrf rrg rrn rrr