-al -ol a-a a-c aaa aac aag aal aao aas ac- aca acc acg acl aco acs ag- aga agc agg agl ago ags al- ala alc alg all alo als aoa aoc aog aol aoo aos as- asa asc asg asl aso ass c-- caa cac cag cal cao cas cca ccc ccg ccl cco ccs cga cgc cgg cgl cgo cgs cl- cla clc clg cll clo cls co- coa coc cog col coo cos csa csc csg csl cso css gaa gac gag gal gao gas gca gcc gcg gcl gco gcs gga ggc ggg ggo ggs gla glc glg gll glo gls goa goc gog gol goo gos gsa gsc gsg gsl gso gss la- laa lac lag lal lao las lca lcc lcg lcl lco lcs lga lgc lgg lgl lgo lgs lla llc llg lll llo lls loa loc log lol loo los lsa lsc lsg lsl lso lss oaa oac oag oal oao oas oc- oca occ ocg ocl oco ocs oga ogc ogg ogl ogo ogs ola olc olg oll olo ols oo- ooa ooc oog ool ooo oos os- osa osc osg osl oso oss saa sac sag sal sao sas sca scc scg scl sco scs sga sgc sgg sgl sgo sgs sla slc slg sll slo sls soa soc sog sol soo sos ss- ssa ssc ssg ssl sso sss