-er a-a a-c aaa aac aad aae aaf aar aas aau ac- aca acc acd ace acf acr acs acu ad- ada adc add ade adf adr ads adu aea aec aed aee aef aer aes aeu af- afa afc afd afe aff afr afs afu ar- ara arc ard are arf arr ars aru as- asa asc asd ase asf asr ass asu au- aua auc aud aue auf aur aus c-- caa cac cad cae caf car cas cau cca ccc ccd cce ccf ccr ccs ccu cda cdc cdd cde cdf cdr cds cdu ce- cea cec ced cee cef cer ces ceu cfa cfc cfd cfe cff cfr cfs cfu cra crc crd cre crf crr crs cru csa csc csd cse csf csr css csu cua cuc cud cue cuf cur cus cuu daa dac dad dae daf dar das dau dca dcc dcd dce dcf dcr dcs dcu dda ddc ddd dde ddf ddr dds ddu de- dea dec ded dee def der des deu dfa dfc dfd dfe dff dfr dfs dfu dra drc drd dre drr drs dru dsa dsc dsd dse dsf dsr dss dsu dua duc dud due duf dur dus eaa eac ead eae eaf ear eas eau ec- eca ecc ecd ece ecf ecr ecs ecu ed- eda edc edd ede edf edr eds edu eea eec eed eee eef eer ees ef- efa efc efd efe eff efr efs era erc erd ere erf err ers eru es- esa esc esd ese esf esr ess esu eu- eua euc eud eue euf eur eus faa fac fad fae faf far fas fau fca fcc fcd fce fcf fcr fcs fcu fda fdc fdd fde fdf fdr fds fdu fea fec fed fee fef fer fes feu ffa ffc ffd ffe fff ffr ffs ffu fra frc frd fre frf frr frs fru fsa fsc fsd fse fsf fsr fss fsu fua fud fue fuf fur fus fuu ra- raa rac rad rae raf rar ras rau rca rcc rcd rce rcf rcr rcs rcu rda rdc rdd rde rdf rdr rds rdu re- rea rec red ree ref rer res reu rfa rfc rfd rfe rff rfr rfs rfu rra rrc rrd rrf rrr rrs rru rsa rsc rsd rse rsf rsr rss rsu rua ruc rud rue ruf rur rus ruu saa sac sad sae saf sar sas sau sca scc scd sce scf scr scs scu sda sdc sdd sde sdf sdr sds sdu se- sea sec sed see sef ser ses seu sfa sfc sfd sfe sff sfr sfs sfu sr- sra src srd sre srf srr srs ss- ssa ssc ssd sse ssf ssr sss ssu sua suc sud sue suf sur sus suu ua- uaa uac uad uae uaf uar uas uau uca ucc ucd uce ucf ucr ucs ucu uda udc udd ude udf udr uds udu uea uec ued uee uef uer ues ufa ufc ufd ufe uff ufr ufs ufu ur- ura urc urd ure urf urr urs uru usa usc usd use usf usr uss usu uua uuc uue uur uus uuu