-er a-a a-c aaa aac aae aao aar aas aau ac- aca acc ace aco acr acs acu aea aec aee aeo aer aes aeu aoa aoc aoe aoo aor aos aou ar- ara arc are aro arr ars aru as- asa asc ase aso asr ass asu au- aua auc aue auo aur aus c-- caa cac cae cao car cas cau cca ccc cce cco ccr ccs ccu ce- cea cec cee ceo cer ces ceu co- coa coc coe coo cor cos cou cra crc cre cro crr crs cru csa csc cse cso csr css csu cua cuc cue cuo cur cus cuu eaa eac eae eao ear eas eau ec- eca ecc ece eco ecr ecs ecu eea eec eee eeo eer ees eo- eoa eoc eoe eoo eor eos eou era erc ere ero err ers eru es- esa esc ese eso esr ess esu eu- eua euc eue eur eus oaa oac oae oao oar oas oau oc- oca occ oco ocr ocs ocu oea oec oee oeo oer oes oo- ooa ooc ooo oor oos or- ora orc ore oro orr ors oru os- osa osc ose oso osr oss osu ou- oua ouc oue ouo our ous ra- raa rac rae rao rar ras rau rca rcc rce rco rcr rcs rcu re- rea rec ree reo rer res reu roa roc roe roo ror ros rou rra rrc rrr rrs rru rsa rsc rse rso rsr rss rsu rua ruc rue ruo rur rus ruu saa sac sae sao sar sas sau sca scc sce sco scr scs scu se- sea sec see seo ser ses seu soa soc soe soo sor sos sou sr- sra src sre sro srr srs ss- ssa ssc sse sso ssr sss ssu sua suc sue suo sur sus suu ua- uaa uac uae uao uar uas uau uca ucc uce uco ucr ucs ucu uea uec uee uer ues uoa uoc uoe uoo uor uos ur- ura urc ure uro urr urs uru usa usc use uso usr uss usu uua uuc uue uur uus uuu