-er a-a a-c aaa aac aae aag aaj aan aar ac- aca acc ace acg acj acn acr aea aec aee aeg aej aen aer ag- aga agc age agg agj agn agr aja ajc aje ajj ajn ajr an- ana anc ane ang anj ann anr ar- ara arc are arg arj arn arr c-- c-j caa cac cae cag caj can car cca ccc cce ccg ccj ccn ccr ce- cea cec cee ceg cej cen cer cga cgc cge cgg cgn cgr cja cjc cjg cjr cn- cna cnc cne cng cnj cnn cnr cra crc cre crg crj crn crr eaa eac eae eag eaj ean ear ec- eca ecc ece ecg ecj ecn ecr eea eec eee eeg een eer ega egc ege egg egn egr eja ejc en- ena enc ene eng enn enr era erc ere erg ern err gaa gac gae gag gaj gan gar gca gcc gce gcg gcn gcr ge- gea gec gee geg gen ger gga ggc ggg ggj ggn ggr gja gjc gje gjg gjr gna gnc gne gnn gnr gra grc gre grg grj grn grr jaa jac jae jag jaj jan jar jca jcc jce jcr jea jec jee jeg jej jen jer jga jge jgn jgr jja jjc jjg jjj jjr jna jnc jne jng jnj jnn jnr jra jrc jrg jrn jrr naa nac nae nag naj nan nar nca ncc nce ncg ncn ncr ne- nea nec nee neg nej nen ner nga ngc nge ngg ngj ngn nja njc nje njn nna nnc nne nng nnn nra nrc nre nrg nrj nrn nrr ra- raa rac rae rag raj ran rar rca rcc rce rcg rcj rcn rcr re- rea rec ree reg ren rer rga rgc rge rgg rgn rgr rja rjc rjg rjr rna rnc rng rnn rnr rra rrc rrg rrn rrr