-er a-a a-c aaa aac aae aag aan aar aau ac- aca acc ace acg acn acr acu aea aec aee aeg aen aer aeu ag- aga agc age agg agn agr agu an- ana anc ane ang ann anr anu ar- ara arc are arg arn arr aru au- aua auc aue aug aun aur c-- caa cac cae cag can car cau cca ccc cce ccg ccn ccr ccu ce- cea cec cee ceg cen cer ceu cga cgc cge cgg cgn cgr cgu cn- cna cnc cne cng cnn cnr cnu cra crc cre crg crn crr cru cua cuc cue cug cun cur cuu eaa eac eae eag ean ear eau ec- eca ecc ece ecg ecn ecr ecu eea eec eee eeg een eer ega egc ege egg egn egr egu en- ena enc ene eng enn enr enu era erc ere erg ern err eru eu- eua euc eue eug eun eur gaa gac gae gag gan gar gau gca gcc gce gcg gcn gcr gcu ge- gea gec gee geg gen ger geu gga ggc ggg ggn ggr ggu gna gnc gne gnn gnr gnu gra grc gre grg grn grr gru gu- gua guc gue gug gun gur guu naa nac nae nag nan nar nau nca ncc nce ncg ncn ncr ncu ne- nea nec nee neg nen ner neu nga ngc nge ngg ngn ngu nna nnc nne nng nnn nnu nra nrc nre nrg nrn nrr nru nua nuc nue nug nun nur nuu ra- raa rac rae rag ran rar rau rca rcc rce rcg rcn rcr rcu re- rea rec ree reg ren rer reu rga rgc rge rgg rgn rgr rna rnc rng rnn rnr rnu rra rrc rrg rrn rrr rru rua ruc rue rug run rur ruu ua- uaa uac uae uag uan uar uau uca ucc uce ucg ucn ucr ucu uea uec uee ueg uen uer uga ugc uge ugg ugn ugr ugu un- una unc une ung unn unr unu ur- ura urc ure urg urn urr uru uua uuc uue uug uun uur uuu