a-a a-t aaa aaf aag aao aap aar aas aat af- afa aff afg afo afp afr afs aft ag- aga agf agg ago agp agr ags agt aoa aof aog aoo aop aor aos aot ap- apa apf apg apo app apr aps apt ar- ara arf arg aro arp arr ars art as- asa asf asg aso asp asr ass ast at- ata atf atg ato atp atr ats att faa faf fag fao fap far fas fat ffa fff ffg ffo ffp ffr ffs fft fga fgf fgg fgp fgr fgs fgt foa fof fog foo fop for fos fot fpa fpg fpo fpp fpr fps fpt fra frf frg fro frp frr frs frt fsa fsf fsg fso fsp fsr fss fst fta ftf ftg fto ftp ftr fts ftt g-p gaa gaf gag gao gap gar gas gat gfa gff gfo gfp gfr gfs gft gga ggg ggo ggp ggr ggs ggt goa gof gog goo gop gor gos got gpa gpf gpg gpo gpp gpr gps gpt gra grf grg gro grp grr grs grt gsa gsf gsg gso gsp gsr gss gst gta gtf gtg gto gtp gtr gts gtt oaa oaf oag oao oap oar oas oat of- ofa off ofg ofo ofp ofr ofs oft oga ogf ogg ogo ogp ogs ogt oo- ooa oof oog ooo oop oor oos oot op- opa opf opg opo opp opr ops opt or- ora orf org oro orp orr ors ort os- osa osf osg oso osp osr oss ost ot- ota otf otg oto otp otr ots ott p-p paa paf pag pao pap par pas pat pfa pff pfg pfo pfp pfr pfs pft pga pgf pgg pgo pgp pgr pgs pgt poa pof pog poo pop por pos pot ppa ppf ppg ppo ppp ppr pps ppt pra prf prg pro prp prr prs prt ps- psa psf psg pso psp psr pss pst pt- pta ptf ptg pto ptp ptr pts ptt ra- raa raf rag rao rap rar ras rat rfa rff rfg rfo rfp rfr rfs rft rga rgf rgg rgo rgp rgr rgs rgt roa rof rog roo rop ror ros rot rpa rpf rpg rpo rpp rpr rps rpt rra rrf rrg rrp rrr rrs rrt rsa rsf rsg rso rsp rsr rss rst rta rtf rtg rto rtp rtr rts rtt saa saf sag sao sap sar sas sat sfa sff sfg sfo sfp sfr sfs sft sga sgf sgg sgo sgp sgr sgs sgt soa sof sog soo sop sor sos sot spa spf spg spo spp spr sps spt sr- sra srf srg sro srp srr srs srt ss- ssa ssf ssg sso ssp ssr sss sst sta stf stg sto stp str sts stt taa taf tag tao tap tar tas tat tfa tff tfg tfo tfp tfr tfs tft tga tgf tgg tgo tgp tgr tgs tgt to- toa tof tog too top tor tos tot tpa tpf tpg tpo tpp tpr tps tpt tra trf trg tro trp trr trs trt tsa tsf tsg tso tsp tsr tss tst tta ttf ttg tto ttp ttr tts ttt