-er a-a a-c aaa aac aad aae aag aao aar aau ac- aca acc acd ace acg aco acr acu ad- ada adc add ade adg ado adr adu aea aec aed aee aeg aeo aer aeu ag- aga agc agd age agg ago agr agu aoa aoc aod aoe aog aoo aor aou ar- ara arc ard are arg aro arr aru au- aua auc aud aue aug auo aur c-- caa cac cad cae cag cao car cau cca ccc ccd cce ccg cco ccr ccu cda cdc cdd cde cdg cdo cdr cdu ce- cea cec ced cee ceg ceo cer ceu cga cgc cgd cge cgg cgo cgr cgu co- coa coc cod coe cog coo cor cou cra crc crd cre crg cro crr cru cua cuc cud cue cug cuo cur cuu daa dac dad dae dag dao dar dau dca dcc dcd dce dcg dco dcr dcu dda ddc ddd dde ddg ddo ddr ddu de- dea dec ded dee deg deo der deu dga dgc dgd dge dgg dgr dgu doa doc dod doe dog doo dor dou dra drc drd dre drg dro drr dru dua duc dud due dug duo dur eaa eac ead eae eag eao ear eau ec- eca ecc ecd ece ecg eco ecr ecu ed- eda edc edd ede edg edo edr edu eea eec eed eee eeg eeo eer ega egc egd ege egg ego egr egu eo- eoa eoc eod eoe eog eoo eor eou era erc erd ere erg ero err eru eu- eua euc eud eue eug eur g-d gaa gac gad gae gag gao gar gau gca gcc gcd gce gcg gco gcr gcu gda gdc gdd gde gdo gdr gdu ge- gea gec ged gee geg geo ger geu gga ggc ggd ggg ggo ggr ggu goa goc god goe gog goo gor gou gra grc grd gre grg gro grr gru gu- gua guc gud gue gug guo gur guu oaa oac oad oae oag oao oar oau oc- oca occ ocd ocg oco ocr ocu oda odc odd ode odg odo odr odu oea oec oed oee oeg oeo oer oga ogc ogd oge ogg ogo oo- ooa ooc ood oog ooo oor or- ora orc ord ore org oro orr oru ou- oua ouc oud oue ouo our ra- raa rac rad rae rag rao rar rau rca rcc rcd rce rcg rco rcr rcu rda rdc rdd rde rdg rdo rdr rdu re- rea rec red ree reg reo rer reu rga rgc rgd rge rgg rgo rgr roa roc rod roe rog roo ror rou rra rrc rrd rrg rrr rru rua ruc rud rue rug ruo rur ruu ua- uaa uac uad uae uag uao uar uau uca ucc ucd uce ucg uco ucr ucu uda udc udd ude udg udo udr udu uea uec ued uee ueg uer uga ugc uge ugg ugo ugr ugu uoa uoc uod uoe uog uoo uor ur- ura urc urd ure urg uro urr uru uua uuc uue uug uur uuu