-er a-a a-c aaa aac aad aae aak aar aas aau ac- aca acc acd ace ack acr acs acu ad- ada adc add ade adk adr ads adu aea aec aed aee aek aer aes aeu aka akc akd ake akk akr aks aku ar- ara arc ard are ark arr ars aru as- asa asc asd ase ask asr ass asu au- aua auc aud aue auk aur aus c-- caa cac cad cae cak car cas cau cca ccc ccd cce cck ccr ccs ccu cda cdc cdd cde cdk cdr cds cdu ce- cea cec ced cee cek cer ces ceu cka ckc ckd cks cra crc crd cre crk crr crs cru csa csc csd cse csk csr css csu cua cuc cud cue cuk cur cus cuu daa dac dad dae dak dar das dau dca dcc dcd dce dck dcr dcs dcu dda ddc ddd dde ddk ddr dds ddu de- dea dec ded dee dek der des deu dka dkc dke dkk dkr dks dku dra drc drd dre drk drr drs dru dsa dsc dsd dse dsk dsr dss dsu dua duc dud due duk dur dus eaa eac ead eae eak ear eas eau ec- eca ecc ecd ece eck ecr ecs ecu ed- eda edc edd ede edk edr eds edu eea eec eed eee eek eer ees eka ekc ekd eke ekr eks eku era erc erd ere erk err ers eru es- esa esc esd ese esk esr ess esu eu- eua euc eud eue eur eus ka- kaa kac kad kae kak kar kas kau kca kcc kcd kce kck kcr kcs kcu kda kdc kde kdk kdr kds kdu ke- kea kec ked kee kek ker kes kkc kke kkk kkr kks kku kra krc krd krk krr krs kru ksa ksc ksd kse ksk ksr kss ksu kuc kud kue kuk kur kus kuu ra- raa rac rad rae rak rar ras rau rca rcc rcd rce rcr rcs rcu rda rdc rdd rde rdr rds rdu re- rea rec red ree rek rer res reu rkc rke rkk rks rku rra rrc rrd rrk rrr rrs rru rsa rsc rsd rse rsk rsr rss rsu rua ruc rud rue ruk rur rus ruu saa sac sad sae sak sar sas sau sca scc scd sce sck scr scs scu sda sdc sdd sde sdk sdr sds sdu se- sea sec sed see sek ser ses seu sk- ska skc skd ske skk skr sks sku sr- sra src srd sre srk srr srs ss- ssa ssc ssd sse ssk ssr sss ssu sua suc sud sue suk sur sus suu ua- uaa uac uad uae uak uar uas uau uca ucc ucd uce uck ucr ucs ucu uda udc udd ude udk udr uds udu uea uec ued uee uer ues uka ukc uke ukk ukr uku ur- ura urc urd ure urk urr urs uru usa usc usd use usk usr uss usu uua uuc uue uur uus uuu