a-a a-t a-z aaa aag aao aar aat aaz ag- aga agg ago agr agt agz aoa aog aoo aor aot ar- ara arg aro arr art arz at- ata atg ato atr att atz az- aza azg azo azt azz gaa gag gao gar gat gaz gga ggg ggo ggr ggt ggz goa gog goo gor got goz gra grg gro grr grt gta gtg gto gtr gtt gza gzo gzr oaa oag oao oar oat oga ogg ogo ogt oo- ooa oog ooo oor oot or- ora org oro orr ort orz ot- ota otg oto otr ott otz oza ozo ozt ozz ra- raa rag rao rar rat raz rga rgg rgo rgr rgt roa rog roo ror rot roz rra rrg rrr rrt rta rtg rto rtr rtt rtz rza rzo taa tag tao tar tat taz tga tgg tgo tgr tgt tgz to- toa tog too tor tot toz tra trg tro trr trt trz tta ttg tto ttr ttt tza z-g zaa zag zao zar zat zaz zgg zo- zoa zog zoo zor zot zro zta ztr zzr zzt zzz