c-- ccc ccg ccm cco cct cgc cgg cgm cgo cgt cmc cmg cmm cmo cmt co- coc cog com coo cot ctc ctg ctm cto ctt gcc gcg gcm gco gct ggc ggg ggm ggo ggt gmc gmg gmm gmo gmt goc gog gom goo got gtc gtg gtm gto gtt m-o mc- mcc mcg mcm mco mct mgc mgm mgo mgt mmc mmg mmm mmo mmt moc mog mom moo mot mtc mtg mtm mto mtt oc- occ ocg ocm oco oct ogc ogg ogo ogt om- omc omg omm omo omt oo- ooc oog oom ooo oot ot- otc otg otm oto ott tcc tcg tcm tco tct tgc tgg tgm tgo tgt tmc tmg tmm tmo tmt to- toc tog tom too tot ttc ttg ttm tto ttt