-er a-a a-c a-z aaa aac aae aag aar aav aaz ac- aca acc ace acg acr acv acz aea aec aee aeg aer aev aez ag- aga agc age agg agr agv agz ar- ara arc are arg arr arv arz av- ava avc ave avg avr avz az- aza aze azg azz c-- caa cac cae cag car cav caz cca ccc cce ccg ccr ccv ccz ce- cea cec cee ceg cer cev cez cga cgc cge cgg cgr cgv cra crc cre crg crr crv crz cva cvc cve cvg cvr cvv cvz cz- czc cze eaa eac eae eag ear eav eaz ec- eca ecc ece ecg ecr ecv eea eec eee eeg eer eev ega egc ege egg egr era erc ere erg err erv erz eva evc eve evg evr evv eze ezr ezz gaa gac gae gag gar gav gaz gca gcc gce gcg gcr ge- gea gec gee geg ger gev gez gga ggc ggg ggr ggv ggz gra grc gre grg grr grv gva gvc gve gvg gvr gza gzr ra- raa rac rae rag rar rav raz rca rcc rce rcg rcr rcv re- rea rec ree reg rer rev rez rga rgc rge rgg rgr rgv rra rrc rrg rrr rva rvc rve rvg rvr rvv rza rze v-a v-e vaa vac vae vag var vav vaz vca vcc vce vcr vea vec vee veg ver vez vga vgc vgg vgr vgz vra vrc vre vrg vrr vva vvc vvg vvr vvv vvz z-g zaa zac zag zar zav zaz zce zea zec zee zer zev zez zgg zgv zzr zzz