a-a a-c aaa aac aag aah aak aas ac- aca acc acg ach ack acs ag- aga agc agg agh agk ags aha ahc ahg ahh ahk ahs aka akc akg akh akk aks as- asa asc asg ash ask ass c-- caa cac cag cah cak cas cca ccc ccg cch cck ccs cga cgc cgg cgh cgs ch- cha chc chg chh chk chs cka ckc ckh cks csa csc csg csh csk css gaa gac gag gah gak gas gca gcc gcg gch gck gcs gga ggc ggg ggh ggs gha ghc ghg ghh ghs gka gkh gks gsa gsc gsg gsk gss haa hac hag hah hak has hca hcc hcg hch hck hcs hga hgc hgg hgh hgk hgs hha hhc hhg hhh hhk hhs hka hkg hkh hkk hks hsa hsc hsg hsh hsk hss ka- kaa kac kag kah kak kas kca kcc kcg kch kck kcs kga kgc kgh kgs kha khh khk khs kkc kkh kkk kks ksa ksc ksg ksh ksk kss saa sac sag sah sak sas sca scc scg sch sck scs sga sgc sgg sgh sgk sgs sh- sha shc shg shh shk shs sk- ska skc skg skh skk sks ss- ssa ssc ssg ssh ssk sss