-er a-a a-c aaa aac aad aae aaf aan aar aas ac- aca acc acd ace acf acn acr acs ad- ada adc add ade adf adn adr ads aea aec aed aee aef aen aer aes af- afa afc afd afe aff afn afr afs an- ana anc and ane anf ann anr ans ar- ara arc ard are arf arn arr ars as- asa asc asd ase asf asn asr ass c-- caa cac cad cae caf can car cas cca ccc ccd cce ccf ccn ccr ccs cda cdc cdd cde cdf cdn cdr cds ce- cea cec ced cee cef cen cer ces cfa cfc cfd cfe cff cfn cfr cfs cn- cna cnc cnd cne cnf cnn cnr cns cra crc crd cre crf crn crr crs csa csc csd cse csf csn csr css daa dac dad dae daf dan dar das dca dcc dcd dce dcf dcn dcr dcs dda ddc ddd dde ddf ddn ddr dds de- dea dec ded dee def den der des dfa dfc dfd dfe dff dfn dfr dfs dna dnc dnd dne dnf dnn dnr dns dra drc drd dre drn drr drs dsa dsc dsd dse dsf dsn dsr dss eaa eac ead eae eaf ean ear eas ec- eca ecc ecd ece ecf ecn ecr ecs ed- eda edc edd ede edf edn edr eds eea eec eed eee eef een eer ees ef- efa efc efd efe eff efr efs en- ena enc end ene enf enn enr ens era erc erd ere erf ern err ers es- esa esc esd ese esf esn esr ess faa fac fad fae faf fan far fas fca fcc fcd fce fcf fcn fcr fcs fda fdc fdd fde fdf fdn fdr fds fea fec fed fee fef fen fer fes ffa ffc ffd ffe fff ffn ffr ffs fna fnc fnd fne fnf fnn fnr fns fra frc frd fre frf frn frr frs fsa fsc fsd fse fsf fsn fsr fss naa nac nad nae naf nan nar nas nca ncc ncd nce ncf ncn ncr ncs nda ndc ndd nde ndf ndn ndr nds ne- nea nec ned nee nef nen ner nes nfa nfc nfd nfe nff nfn nfr nfs nna nnc nne nnf nnn nns nra nrc nrd nre nrf nrn nrr nrs nsa nsc nsd nse nsf nsn nsr nss ra- raa rac rad rae raf ran rar ras rca rcc rcd rce rcf rcn rcr rcs rda rdc rdd rde rdf rdn rdr rds re- rea rec red ree ref ren rer res rfa rfc rfd rfe rff rfn rfr rfs rna rnc rnd rnn rnr rns rra rrc rrd rrf rrn rrr rrs rsa rsc rsd rse rsf rsn rsr rss saa sac sad sae saf san sar sas sca scc scd sce scf scn scr scs sda sdc sdd sde sdf sdn sdr sds se- sea sec sed see sef sen ser ses sfa sfc sfd sfe sff sfn sfr sfs sna snc snd sne snf snn snr sns sr- sra src srd sre srf srn srr srs ss- ssa ssc ssd sse ssf ssn ssr sss