a-a a-t aaa aag aao aap aar aat ag- aga agg ago agp agr agt aoa aog aoo aop aor aot ap- apa apg apo app apr apt ar- ara arg aro arp arr art at- ata atg ato atp atr att g-p gaa gag gao gap gar gat gga ggg ggo ggp ggr ggt goa gog goo gop gor got gpa gpg gpo gpp gpr gpt gra grg gro grp grr grt gta gtg gto gtp gtr gtt oaa oag oao oap oar oat oga ogg ogo ogp ogt oo- ooa oog ooo oop oor oot op- opa opg opo opp opr opt or- ora org oro orp orr ort ot- ota otg oto otp otr ott p-p paa pag pao pap par pat pga pgg pgo pgp pgr pgt poa pog poo pop por pot ppa ppg ppo ppp ppr ppt pra prg pro prp prr prt pt- pta ptg pto ptp ptr ptt ra- raa rag rao rap rar rat rga rgg rgo rgp rgr rgt roa rog roo rop ror rot rpa rpg rpo rpp rpr rpt rra rrg rrp rrr rrt rta rtg rto rtp rtr rtt taa tag tao tap tar tat tga tgg tgo tgp tgr tgt to- toa tog too top tor tot tpa tpg tpo tpp tpr tpt tra trg tro trp trr trt tta ttg tto ttp ttr ttt