a-a a-t aaa aaf aag aan aao aar aas aat af- afa aff afg afn afo afr afs aft ag- aga agf agg agn ago agr ags agt an- ana anf ang ann ano anr ans ant aoa aof aog aon aoo aor aos aot ar- ara arf arg arn aro arr ars art as- asa asf asg asn aso asr ass ast at- ata atf atg atn ato atr ats att faa faf fag fan fao far fas fat ffa fff ffg ffn ffo ffr ffs fft fga fgf fgg fgn fgr fgs fgt fna fnf fng fnn fnr fns fnt foa fof fog fon foo for fos fot fra frf frg frn fro frr frs frt fsa fsf fsg fsn fso fsr fss fst fta ftf ftg ftn fto ftr fts ftt gaa gaf gag gan gao gar gas gat gfa gff gfo gfr gfs gft gga ggg ggn ggo ggr ggs ggt gna gnf gnn gno gnr gns gnt goa gof gog gon goo gor gos got gra grf grg grn gro grr grs grt gsa gsf gsg gsn gso gsr gss gst gta gtf gtg gtn gto gtr gts gtt naa naf nag nan nao nar nas nat nfa nff nfn nfo nfr nfs nft nga ngf ngg ngn ngo ngs ngt nna nnf nng nnn nno nns nnt no- noa nof nog non noo nor nos not nra nrf nrg nrn nro nrr nrs nrt nsa nsf nsg nsn nso nsr nss nst nta ntf ntg ntn nto ntr nts ntt oaa oaf oag oan oao oar oas oat of- ofa off ofg ofn ofo ofr ofs oft oga ogf ogg ogn ogo ogs ogt on- ona onf ong onn ono onr ons ont oo- ooa oof oog oon ooo oor oos oot or- ora orf org orn oro orr ors ort os- osa osf osg osn oso osr oss ost ot- ota otf otg otn oto otr ots ott ra- raa raf rag ran rao rar ras rat rfa rff rfg rfn rfo rfr rfs rft rga rgf rgg rgn rgo rgr rgs rgt rna rng rnn rno rnr rns rnt roa rof rog ron roo ror ros rot rra rrf rrg rrn rrr rrs rrt rsa rsf rsg rsn rso rsr rss rst rta rtf rtg rtn rto rtr rts rtt saa saf sag san sao sar sas sat sfa sff sfg sfn sfo sfr sfs sft sga sgf sgg sgn sgo sgr sgs sgt sna snf sng snn sno snr sns snt soa sof sog son soo sor sos sot sr- sra srf srg srn sro srr srs srt ss- ssa ssf ssg ssn sso ssr sss sst sta stf stg stn sto str sts stt taa taf tag tan tao tar tas tat tfa tff tfg tfn tfo tfr tfs tft tga tgf tgg tgn tgo tgr tgs tgt tna tnf tng tnn tno tnr tns tnt to- toa tof tog ton too tor tos tot tra trf trg trn tro trr trs trt tsa tsf tsg tsn tso tsr tss tst tta ttf ttg ttn tto ttr tts ttt