-er a-a a-c a-t aaa aac aae aao aar aat aau ac- aca acc ace aco acr act acu aea aec aee aeo aer aet aeu aoa aoc aoe aoo aor aot aou ar- ara arc are aro arr art aru at- ata atc ate ato atr att atu au- aua auc aue auo aur aut c-- caa cac cae cao car cat cau cca ccc cce cco ccr cct ccu ce- cea cec cee ceo cer cet ceu co- coa coc coe coo cor cot cou cra crc cre cro crr crt cru cta ctc cte cto ctr ctt ctu cua cuc cue cuo cur cut cuu eaa eac eae eao ear eat eau ec- eca ecc ece eco ecr ect ecu eea eec eee eeo eer eet eo- eoa eoc eoe eoo eor eot eou era erc ere ero err ert eru eta etc ete eto etr ett etu eu- eua euc eue eur eut oaa oac oae oao oar oat oau oc- oca occ oco ocr oct ocu oea oec oee oeo oer oet oo- ooa ooc ooo oor oot or- ora orc ore oro orr ort oru ot- ota otc ote oto otr ott otu ou- oua ouc oue ouo our out ra- raa rac rae rao rar rat rau rca rcc rce rco rcr rct rcu re- rea rec ree reo rer ret reu roa roc roe roo ror rot rou rra rrc rrr rrt rru rta rtc rte rto rtr rtt rtu rua ruc rue ruo rur rut ruu taa tac tae tao tar tat tau tca tcc tce tco tcr tct tcu te- tea tec tee teo ter tet teu to- toa toc toe too tor tot tou tra trc tre tro trr trt tru tta ttc tte tto ttr ttt ttu tua tuc tue tuo tur tut tuu ua- uaa uac uae uao uar uat uau uca ucc uce uco ucr uct ucu uea uec uee uer uet uoa uoc uoe uoo uor uot ur- ura urc ure uro urr urt uru uta utc ute uto utr utt utu uua uuc uue uur uut uuu