-er a-a a-c aaa aac aad aae aaf aan aao aar ac- aca acc acd ace acf acn aco acr ad- ada adc add ade adf adn ado adr aea aec aed aee aef aen aeo aer af- afa afc afd afe aff afn afo afr an- ana anc and ane anf ann ano anr aoa aoc aod aoe aof aon aoo aor ar- ara arc ard are arf arn aro arr c-- caa cac cad cae caf can cao car cca ccc ccd cce ccf ccn cco ccr cda cdc cdd cde cdf cdn cdo cdr ce- cea cec ced cee cef cen ceo cer cfa cfc cfd cfe cff cfn cfo cfr cn- cna cnc cnd cne cnf cnn cno cnr co- coa coc cod coe cof con coo cor cra crc crd cre crf crn cro crr daa dac dad dae daf dan dao dar dca dcc dcd dce dcf dcn dco dcr dda ddc ddd dde ddf ddn ddo ddr de- dea dec ded dee def den deo der dfa dfc dfd dfe dff dfn dfo dfr dna dnc dnd dne dnf dnn dno dnr doa doc dod doe dof don doo dor dra drc drd dre drn dro drr eaa eac ead eae eaf ean eao ear ec- eca ecc ecd ece ecf ecn eco ecr ed- eda edc edd ede edf edn edo edr eea eec eed eee eef een eeo eer ef- efa efc efd efe eff efo efr en- ena enc end ene enf enn eno enr eo- eoa eoc eod eoe eof eon eoo eor era erc erd ere erf ern ero err faa fac fad fae faf fan fao far fca fcc fcd fce fcf fcn fco fcr fda fdc fdd fde fdf fdn fdo fdr fea fec fed fee fef fen feo fer ffa ffc ffd ffe fff ffn ffo ffr fna fnc fnd fne fnf fnn fnr foa foc foe fof fon foo for fra frc frd fre frf frn fro frr naa nac nad nae naf nan nao nar nca ncc ncd nce ncf ncn nco ncr nda ndc ndd nde ndf ndn ndo ndr ne- nea nec ned nee nef nen neo ner nfa nfc nfd nfe nff nfn nfo nfr nna nnc nne nnf nnn nno no- noa noc nod noe nof non noo nor nra nrc nrd nre nrf nrn nro nrr oaa oac oad oae oaf oan oao oar oc- oca occ ocd ocf ocn oco ocr oda odc odd ode odf odn odo odr oea oec oed oee oef oen oeo oer of- ofa ofc ofd ofe off ofn ofo ofr on- ona onc ond one onf onn ono onr oo- ooa ooc ood oof oon ooo oor or- ora orc ord ore orf orn oro orr ra- raa rac rad rae raf ran rao rar rca rcc rcd rce rcf rcn rco rcr rda rdc rdd rde rdf rdn rdo rdr re- rea rec red ree ref ren reo rer rfa rfc rfd rfe rff rfn rfo rfr rna rnc rnd rnn rno rnr roa roc rod roe rof ron roo ror rra rrc rrd rrf rrn rrr