-er a-a a-c aaa aac aae aaf aan aao aar aau ac- aca acc ace acf acn aco acr acu aea aec aee aef aen aeo aer aeu af- afa afc afe aff afn afo afr afu an- ana anc ane anf ann ano anr anu aoa aoc aoe aof aon aoo aor aou ar- ara arc are arf arn aro arr aru au- aua auc aue auf aun auo aur c-- caa cac cae caf can cao car cau cca ccc cce ccf ccn cco ccr ccu ce- cea cec cee cef cen ceo cer ceu cfa cfc cfe cff cfn cfo cfr cfu cn- cna cnc cne cnf cnn cno cnr cnu co- coa coc coe cof con coo cor cou cra crc cre crf crn cro crr cru cua cuc cue cuf cun cuo cur cuu eaa eac eae eaf ean eao ear eau ec- eca ecc ece ecf ecn eco ecr ecu eea eec eee eef een eeo eer ef- efa efc efe eff efo efr en- ena enc ene enf enn eno enr enu eo- eoa eoc eoe eof eon eoo eor eou era erc ere erf ern ero err eru eu- eua euc eue euf eun eur faa fac fae faf fan fao far fau fca fcc fce fcf fcn fco fcr fcu fea fec fee fef fen feo fer feu ffa ffc ffe fff ffn ffo ffr ffu fna fnc fne fnf fnn fnr fnu foa foc foe fof fon foo for fou fra frc fre frf frn fro frr fru fua fue fuf fun fuo fur fuu naa nac nae naf nan nao nar nau nca ncc nce ncf ncn nco ncr ncu ne- nea nec nee nef nen neo ner neu nfa nfc nfe nff nfn nfo nfr nfu nna nnc nne nnf nnn nno nnu no- noa noc noe nof non noo nor nou nra nrc nre nrf nrn nro nrr nru nua nuc nue nun nuo nur nuu oaa oac oae oaf oan oao oar oau oc- oca occ ocf ocn oco ocr ocu oea oec oee oef oen oeo oer of- ofa ofc ofe off ofn ofo ofr ofu on- ona onc one onf onn ono onr onu oo- ooa ooc oof oon ooo oor or- ora orc ore orf orn oro orr oru ou- oua ouc oue ouf oun ouo our ra- raa rac rae raf ran rao rar rau rca rcc rce rcf rcn rco rcr rcu re- rea rec ree ref ren reo rer reu rfa rfc rfe rff rfn rfo rfr rfu rna rnc rnn rno rnr rnu roa roc roe rof ron roo ror rou rra rrc rrf rrn rrr rru rua ruc rue ruf run ruo rur ruu ua- uaa uac uae uaf uan uao uar uau uca ucc uce ucf ucn uco ucr ucu uea uec uee uef uen uer ufa ufc ufe uff ufn ufo ufr ufu un- una unc une unf unn uno unr unu uoa uoc uoe uon uoo uor ur- ura urc ure urf urn uro urr uru uua uuc uue uun uur uuu