a-a a-t a-z aaa aag aao aap aar aat aaz ag- aga agg ago agp agr agt agz aoa aog aoo aop aor aot ap- apa apg apo app apr apt ar- ara arg aro arp arr art arz at- ata atg ato atp atr att atz az- aza azg azo azp azt azz g-p gaa gag gao gap gar gat gaz gga ggg ggo ggp ggr ggt ggz goa gog goo gop gor got goz gpa gpg gpo gpp gpr gpt gpz gra grg gro grp grr grt gta gtg gto gtp gtr gtt gza gzo gzp gzr 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 orz ot- ota otg oto otp otr ott otz oza ozo ozt ozz p-p paa pag pao pap par pat paz pga pgg pgo pgp pgr pgt poa pog poo pop por pot poz ppa ppg ppo ppp ppr ppt ppz pra prg pro prp prr prt prz pt- pta ptg pto ptp ptr ptt ptz pzp pzt ra- raa rag rao rap rar rat raz rga rgg rgo rgp rgr rgt roa rog roo rop ror rot roz rpa rpg rpo rpp rpr rpt rpz rra rrg rrp rrr rrt rta rtg rto rtp rtr rtt rtz rza rzo taa tag tao tap tar tat taz tga tgg tgo tgp tgr tgt tgz to- toa tog too top tor tot toz tpa tpg tpo tpp tpr tpt tpz tra trg tro trp trr trt trz tta ttg tto ttp ttr ttt tza z-g zaa zag zao zap zar zat zaz zgg zo- zoa zog zoo zor zot zpg zpo zpp zpr zpt zro zrp zta ztr zzr zzt zzz