-er a-a a-c a-t aaa aac aad aae aak aar aat aau ac- aca acc acd ace ack acr act acu ad- ada adc add ade adk adr adt adu aea aec aed aee aek aer aet aeu aka akc akd ake akk akr aku ar- ara arc ard are ark arr art aru at- ata atc atd ate atr att atu au- aua auc aud aue auk aur aut c-- caa cac cad cae cak car cat cau cca ccc ccd cce cck ccr cct ccu cda cdc cdd cde cdk cdr cdt cdu ce- cea cec ced cee cek cer cet ceu cka ckc ckd ckt cra crc crd cre crk crr crt cru cta ctc ctd cte ctk ctr ctt ctu cua cuc cud cue cuk cur cut cuu daa dac dad dae dak dar dat dau dca dcc dcd dce dck dcr dct dcu dda ddc ddd dde ddk ddr ddt ddu de- dea dec ded dee dek der det deu dka dkc dke dkk dkr dkt dku dra drc drd dre drk drr drt dru dta dtc dtd dte dtk dtr dtt dtu dua duc dud due duk dur dut eaa eac ead eae eak ear eat eau ec- eca ecc ecd ece eck ecr ect ecu ed- eda edc edd ede edk edr edt edu eea eec eed eee eek eer eet eka ekc ekd eke ekr ekt eku era erc erd ere erk err ert eru eta etc etd ete etk etr ett etu eu- eua euc eud eue eur eut k-t ka- kaa kac kad kae kak kar kat kau kca kcc kcd kce kck kcr kct kcu kda kdc kde kdk kdr kdt kdu ke- kea kec ked kee kek ker ket kkc kke kkk kkr kkt kku kra krc krd krk krr krt kru kta ktc kte ktk ktr ktt ktu kuc kud kue kuk kur kut kuu ra- raa rac rad rae rak rar rat rau rca rcc rcd rce rcr rct rcu rda rdc rdd rde rdr rdt rdu re- rea rec red ree rek rer ret reu rkc rke rkk rkt rku rra rrc rrd rrk rrr rrt rru rta rtc rtd rte rtk rtr rtt rtu rua ruc rud rue ruk rur rut ruu taa tac tad tae tak tar tat tau tca tcc tcd tce tck tcr tct tcu tda tdc tdd tde tdk tdr tdt tdu te- tea tec ted tee tek ter tet teu tka tkc tke tkk tkr tkt tra trc trd tre trk trr trt tru tta ttc ttd tte ttk ttr ttt ttu tua tuc tud tue tuk tur tut tuu ua- uaa uac uad uae uak uar uat uau uca ucc ucd uce uck ucr uct ucu uda udc udd ude udk udr udt udu uea uec ued uee uer uet uka ukc uke ukk ukr uku ur- ura urc urd ure urk urr urt uru uta utc utd ute utk utr utt utu uua uuc uue uur uut uuu