-er a-a a-c aaa aac aad aae aar aas aau ac- aca acc acd ace acr acs acu ad- ada adc add ade adr ads adu aea aec aed aee aer aes aeu ar- ara arc ard are arr ars aru as- asa asc asd ase asr ass asu au- aua auc aud aue aur aus c-- caa cac cad cae car cas cau cca ccc ccd cce ccr ccs ccu cda cdc cdd cde cdr cds cdu ce- cea cec ced cee cer ces ceu cra crc crd cre crr crs cru csa csc csd cse csr css csu cua cuc cud cue cur cus cuu daa dac dad dae dar das dau dca dcc dcd dce dcr dcs dcu dda ddc ddd dde ddr dds ddu de- dea dec ded dee der des deu dra drc drd dre drr drs dru dsa dsc dsd dse dsr dss dsu dua duc dud due dur dus eaa eac ead eae ear eas eau ec- eca ecc ecd ece ecr ecs ecu ed- eda edc edd ede edr eds edu eea eec eed eee eer ees era erc erd ere err ers eru es- esa esc esd ese esr ess esu eu- eua euc eud eue eur eus ra- raa rac rad rae rar ras rau rca rcc rcd rce rcr rcs rcu rda rdc rdd rde rdr rds rdu re- rea rec red ree rer res reu rra rrc rrd rrr rrs rru rsa rsc rsd rse rsr rss rsu rua ruc rud rue rur rus ruu saa sac sad sae sar sas sau sca scc scd sce scr scs scu sda sdc sdd sde sdr sds sdu se- sea sec sed see ser ses seu sr- sra src srd sre srr srs ss- ssa ssc ssd sse ssr sss ssu sua suc sud sue sur sus suu ua- uaa uac uad uae uar uas uau uca ucc ucd uce ucr ucs ucu uda udc udd ude udr uds udu uea uec ued uee uer ues ur- ura urc urd ure urr urs uru usa usc usd use usr uss usu uua uuc uue uur uus uuu