-al -ol a-a a-c aaa aac aag aal aao aar ac- aca acc acg acl aco acr ag- aga agc agg agl ago agr al- ala alc alg all alo alr aoa aoc aog aol aoo aor ar- ara arc arg arl aro arr c-- caa cac cag cal cao car cca ccc ccg ccl cco ccr cga cgc cgg cgl cgo cgr cl- cla clc clg cll clo clr co- coa coc cog col coo cor cra crc crg crl cro crr gaa gac gag gal gao gar gca gcc gcg gcl gco gcr gga ggc ggg ggo ggr gla glc glg gll glo glr goa goc gog gol goo gor gra grc grg grl gro grr la- laa lac lag lal lao lar lca lcc lcg lcl lco lcr lga lgc lgg lgl lgo lgr lla llc llg lll llo llr loa loc log lol loo lor lra lrc lrg lro lrr oaa oac oag oal oao oar oc- oca occ ocg ocl oco ocr oga ogc ogg ogl ogo ola olc olg oll olo oo- ooa ooc oog ool ooo oor or- ora orc org orl oro orr ra- raa rac rag ral rao rar rca rcc rcg rcl rco rcr rga rgc rgg rgo rgr rla rlc rlg rll rlo rlr roa roc rog rol roo ror rra rrc rrg rrl rrr