a-a a-c aaa aac aag aak aan aao aar ac- aca acc acg ack acn aco acr ag- aga agc agg agk agn ago agr aka akc akg akk akn ako akr an- ana anc ang ank ann ano anr aoa aoc aog aok aon aoo aor ar- ara arc arg ark arn aro arr c-- caa cac cag cak can cao car cca ccc ccg cck ccn cco ccr cga cgc cgg cgn cgo cgr cka ckc cko cn- cna cnc cng cnn cno cnr co- coa coc cog cok con coo cor cra crc crg crk crn cro crr gaa gac gag gak gan gao gar gca gcc gcg gck gcn gco gcr gga ggc ggg ggn ggo ggr gka gkn gko gna gnc gnn gno gnr goa goc gog gok gon goo gor gra grc grg grk grn gro grr ka- kaa kac kag kak kan kao kar kca kcc kcg kck kcn kcr kga kgc kgo kkc kkk kkn kkr kn- kna knc kng knk knn kno knr koa koc kog kok kon koo kor kra krc krg krk krn kro krr naa nac nag nak nan nao nar nca ncc ncg nck ncn nco ncr nga ngc ngg ngk ngn ngo nka nkc nkk nkn nko nkr nna nnc nng nnk nnn nno no- noa noc nog nok non noo nor nra nrc nrg nrk nrn nro nrr oaa oac oag oak oan oao oar oc- oca occ ocg ock ocn oco ocr oga ogc ogg ogn ogo oka okc okg okk oko okr on- ona onc ong onk onn ono onr oo- ooa ooc oog ook oon ooo oor or- ora orc org ork orn oro orr ra- raa rac rag rak ran rao rar rca rcc rcg rcn rco rcr rga rgc rgg rgk rgn rgo rgr rkc rkg rkk rko rna rnc rng rnn rno rnr roa roc rog rok ron roo ror rra rrc rrg rrk rrn rrr