a-a a-t aaa aag aao aap aas aat ag- aga agg ago agp ags agt aoa aog aoo aop aos aot ap- apa apg apo app aps apt as- asa asg aso asp ass ast at- ata atg ato atp ats att g-p gaa gag gao gap gas gat gga ggg ggo ggp ggs ggt goa gog goo gop gos got gpa gpg gpo gpp gps gpt gsa gsg gso gsp gss gst gta gtg gto gtp gts gtt oaa oag oao oap oas oat oga ogg ogo ogp ogs ogt oo- ooa oog ooo oop oos oot op- opa opg opo opp ops opt os- osa osg oso osp oss ost ot- ota otg oto otp ots ott p-p paa pag pao pap pas pat pga pgg pgo pgp pgs pgt poa pog poo pop pos pot ppa ppg ppo ppp pps ppt ps- psa psg pso psp pss pst pt- pta ptg pto ptp pts ptt saa sag sao sap sas sat sga sgg sgo sgp sgs sgt soa sog soo sop sos sot spa spg spo spp sps spt ss- ssa ssg sso ssp sss sst sta stg sto stp sts stt taa tag tao tap tas tat tga tgg tgo tgp tgs tgt to- toa tog too top tos tot tpa tpg tpo tpp tps tpt tsa tsg tso tsp tss tst tta ttg tto ttp tts ttt