a-a a-c aaa aac aae aag aah aak aas ac- aca acc ace acg ach ack acs aea aec aee aeg aeh aek aes ag- aga agc age agg agh agk ags aha ahc ahe ahg ahh ahk ahs aka akc ake akg akh akk aks as- asa asc ase asg ash ask ass c-- caa cac cae cag cah cak cas cca ccc cce ccg cch cck ccs ce- cea cec cee ceg ceh cek ces cga cgc cge cgg cgh cgs ch- cha chc che chg chh chk chs cka ckc ckh cks csa csc cse csg csh csk css eaa eac eae eag eah eak eas ec- eca ecc ece ecg ech eck ecs eea eec eee eeg eek ees ega egc ege egg egh egs eha ehc ehe ehg ehh ehs eka ekc eke ekg ekh eks es- esa esc ese esg esh esk ess gaa gac gae gag gah gak gas gca gcc gce gcg gch gck gcs ge- gea gec gee geg geh gek ges gga ggc ggg ggh ggs gha ghc ghe ghg ghh ghs gka gkh gks gsa gsc gse gsg gsk gss haa hac hae hag hah hak has hca hcc hce hcg hch hck hcs he- hea hec hee heg heh hek hes hga hgc hge hgg hgh hgk hgs hha hhc hhe hhg hhh hhk hhs hka hkg hkh hkk hks hsa hsc hse hsg hsh hsk hss ka- kaa kac kae kag kah kak kas kca kcc kce kcg kch kck kcs ke- kea kec kee keg keh kek kes kga kgc kgh kgs kha khe khh khk khs kkc kke kkh kkk kks ksa ksc kse ksg ksh ksk kss saa sac sae sag sah sak sas sca scc sce scg sch sck scs se- sea sec see seg seh sek ses sga sgc sge sgg sgh sgk sgs sh- sha shc she shg shh shk shs sk- ska skc ske skg skh skk sks ss- ssa ssc sse ssg ssh ssk sss