-er a-a a-c a-t aaa aac aae aaf aan aao aar aat ac- aca acc ace acf acn aco acr act aea aec aee aef aen aeo aer aet af- afa afc afe aff afn afo afr aft an- ana anc ane anf ann ano anr ant aoa aoc aoe aof aon aoo aor aot ar- ara arc are arf arn aro arr art at- ata atc ate atf atn ato atr att c-- caa cac cae caf can cao car cat cca ccc cce ccf ccn cco ccr cct ce- cea cec cee cef cen ceo cer cet cfa cfc cfe cff cfn cfo cfr cft cn- cna cnc cne cnf cnn cno cnr cnt co- coa coc coe cof con coo cor cot cra crc cre crf crn cro crr crt cta ctc cte ctf ctn cto ctr ctt eaa eac eae eaf ean eao ear eat ec- eca ecc ece ecf ecn eco ecr ect eea eec eee eef een eeo eer eet ef- efa efc efe eff efo efr eft en- ena enc ene enf enn eno enr ent eo- eoa eoc eoe eof eon eoo eor eot era erc ere erf ern ero err ert eta etc ete etf etn eto etr ett faa fac fae faf fan fao far fat fca fcc fce fcf fcn fco fcr fct fea fec fee fef fen feo fer fet ffa ffc ffe fff ffn ffo ffr fft fna fnc fne fnf fnn fnr fnt foa foc foe fof fon foo for fot fra frc fre frf frn fro frr frt fta ftc fte ftf ftn fto ftr ftt naa nac nae naf nan nao nar nat nca ncc nce ncf ncn nco ncr nct ne- nea nec nee nef nen neo ner net nfa nfc nfe nff nfn nfo nfr nft nna nnc nne nnf nnn nno nnt no- noa noc noe nof non noo nor not nra nrc nre nrf nrn nro nrr nrt nta ntc nte ntf ntn nto ntr ntt oaa oac oae oaf oan oao oar oat oc- oca occ ocf ocn oco ocr oct oea oec oee oef oen oeo oer oet of- ofa ofc ofe off ofn ofo ofr oft on- ona onc one onf onn ono onr ont oo- ooa ooc oof oon ooo oor oot or- ora orc ore orf orn oro orr ort ot- ota otc ote otf otn oto otr ott ra- raa rac rae raf ran rao rar rat rca rcc rce rcf rcn rco rcr rct re- rea rec ree ref ren reo rer ret rfa rfc rfe rff rfn rfo rfr rft rna rnc rnn rno rnr rnt roa roc roe rof ron roo ror rot rra rrc rrf rrn rrr rrt rta rtc rte rtf rtn rto rtr rtt taa tac tae taf tan tao tar tat tca tcc tce tcf tcn tco tcr tct te- tea tec tee tef ten teo ter tet tfa tfc tfe tff tfn tfo tfr tft tna tnc tne tnf tnn tno tnr tnt to- toa toc toe tof ton too tor tot tra trc tre trf trn tro trr trt tta ttc tte ttf ttn tto ttr ttt