-er a-a a-c aaa aac aae aan aao aar aau ac- aca acc ace acn aco acr acu aea aec aee aen aeo aer aeu an- ana anc ane ann ano anr anu aoa aoc aoe aon aoo aor aou ar- ara arc are arn aro arr aru au- aua auc aue aun auo aur c-- caa cac cae can cao car cau cca ccc cce ccn cco ccr ccu ce- cea cec cee cen ceo cer ceu cn- cna cnc cne cnn cno cnr cnu co- coa coc coe con coo cor cou cra crc cre crn cro crr cru cua cuc cue cun cuo cur cuu eaa eac eae ean eao ear eau ec- eca ecc ece ecn eco ecr ecu eea eec eee een eeo eer en- ena enc ene enn eno enr enu eo- eoa eoc eoe eon eoo eor eou era erc ere ern ero err eru eu- eua euc eue eun eur naa nac nae nan nao nar nau nca ncc nce ncn nco ncr ncu ne- nea nec nee nen neo ner neu nna nnc nne nnn nno nnu no- noa noc noe non noo nor nou nra nrc nre nrn nro nrr nru nua nuc nue nun nuo nur nuu oaa oac oae oan oao oar oau oc- oca occ ocn oco ocr ocu oea oec oee oen oeo oer on- ona onc one onn ono onr onu oo- ooa ooc oon ooo oor or- ora orc ore orn oro orr oru ou- oua ouc oue oun ouo our ra- raa rac rae ran rao rar rau rca rcc rce rcn rco rcr rcu re- rea rec ree ren reo rer reu rna rnc rnn rno rnr rnu roa roc roe ron roo ror rou rra rrc rrn rrr rru rua ruc rue run ruo rur ruu ua- uaa uac uae uan uao uar uau uca ucc uce ucn uco ucr ucu uea uec uee uen uer un- una unc une unn uno unr unu uoa uoc uoe uon uoo uor ur- ura urc ure urn uro urr uru uua uuc uue uun uur uuu