-er a-a a-c aaa aac aad aae aao aar aau ac- aca acc acd ace aco acr acu ad- ada adc add ade ado adr adu aea aec aed aee aeo aer aeu aoa aoc aod aoe aoo aor aou ar- ara arc ard are aro arr aru au- aua auc aud aue auo aur c-- caa cac cad cae cao car cau cca ccc ccd cce cco ccr ccu cda cdc cdd cde cdo cdr cdu ce- cea cec ced cee ceo cer ceu co- coa coc cod coe coo cor cou cra crc crd cre cro crr cru cua cuc cud cue cuo cur cuu daa dac dad dae dao dar dau dca dcc dcd dce dco dcr dcu dda ddc ddd dde ddo ddr ddu de- dea dec ded dee deo der deu doa doc dod doe doo dor dou dra drc drd dre dro drr dru dua duc dud due duo dur eaa eac ead eae eao ear eau ec- eca ecc ecd ece eco ecr ecu ed- eda edc edd ede edo edr edu eea eec eed eee eeo eer eo- eoa eoc eod eoe eoo eor eou era erc erd ere ero err eru eu- eua euc eud eue eur oaa oac oad oae oao oar oau oc- oca occ ocd oco ocr ocu oda odc odd ode odo odr odu oea oec oed oee oeo oer oo- ooa ooc ood ooo oor or- ora orc ord ore oro orr oru ou- oua ouc oud oue ouo our ra- raa rac rad rae rao rar rau rca rcc rcd rce rco rcr rcu rda rdc rdd rde rdo rdr rdu re- rea rec red ree reo rer reu roa roc rod roe roo ror rou rra rrc rrd rrr rru rua ruc rud rue ruo rur ruu ua- uaa uac uad uae uao uar uau uca ucc ucd uce uco ucr ucu uda udc udd ude udo udr udu uea uec ued uee uer uoa uoc uod uoe uoo uor ur- ura urc urd ure uro urr uru uua uuc uue uur uuu