-er a-a a-c aaa aac aae aag aan aao aar aau ac- aca acc ace acg acn aco acr acu aea aec aee aeg aen aeo aer aeu ag- aga agc age agg agn ago agr agu an- ana anc ane ang ann ano anr anu aoa aoc aoe aog aon aoo aor aou ar- ara arc are arg arn aro arr aru au- aua auc aue aug aun auo aur c-- caa cac cae cag can cao car cau cca ccc cce ccg ccn cco ccr ccu ce- cea cec cee ceg cen ceo cer ceu cga cgc cge cgg cgn cgo cgr cgu cn- cna cnc cne cng cnn cno cnr cnu co- coa coc coe cog con coo cor cou cra crc cre crg crn cro crr cru cua cuc cue cug cun cuo cur cuu eaa eac eae eag ean eao ear eau ec- eca ecc ece ecg ecn eco ecr ecu eea eec eee eeg een eeo eer ega egc ege egg egn ego egr egu en- ena enc ene eng enn eno enr enu eo- eoa eoc eoe eog eon eoo eor eou era erc ere erg ern ero err eru eu- eua euc eue eug eun eur gaa gac gae gag gan gao gar gau gca gcc gce gcg gcn gco gcr gcu ge- gea gec gee geg gen geo ger geu gga ggc ggg ggn ggo ggr ggu gna gnc gne gnn gno gnr gnu goa goc goe gog gon goo gor gou gra grc gre grg grn gro grr gru gu- gua guc gue gug gun guo gur guu naa nac nae nag nan nao nar nau nca ncc nce ncg ncn nco ncr ncu ne- nea nec nee neg nen neo ner neu nga ngc nge ngg ngn ngo ngu nna nnc nne nng nnn nno nnu no- noa noc noe nog non noo nor nou nra nrc nre nrg nrn nro nrr nru nua nuc nue nug nun nuo nur nuu oaa oac oae oag oan oao oar oau oc- oca occ ocg ocn oco ocr ocu oea oec oee oeg oen oeo oer oga ogc oge ogg ogn ogo on- ona onc one ong onn ono onr onu oo- ooa ooc oog oon ooo oor or- ora orc ore org orn oro orr oru ou- oua ouc oue oun ouo our ra- raa rac rae rag ran rao rar rau rca rcc rce rcg rcn rco rcr rcu re- rea rec ree reg ren reo rer reu rga rgc rge rgg rgn rgo rgr rna rnc rng rnn rno rnr rnu roa roc roe rog ron roo ror rou rra rrc rrg rrn rrr rru rua ruc rue rug run ruo rur ruu ua- uaa uac uae uag uan uao uar uau uca ucc uce ucg ucn uco ucr ucu uea uec uee ueg uen uer uga ugc uge ugg ugn ugo ugr ugu un- una unc une ung unn uno unr unu uoa uoc uoe uog uon uoo uor ur- ura urc ure urg urn uro urr uru uua uuc uue uug uun uur uuu