a-a a-t aaa aaf aag aan aao aas aat af- afa aff afg afn afo afs aft ag- aga agf agg agn ago ags agt an- ana anf ang ann ano ans ant aoa aof aog aon aoo aos aot as- asa asf asg asn aso ass ast at- ata atf atg atn ato ats att faa faf fag fan fao fas fat ffa fff ffg ffn ffo ffs fft fga fgf fgg fgn fgs fgt fna fnf fng fnn fns fnt foa fof fog fon foo fos fot fsa fsf fsg fsn fso fss fst fta ftf ftg ftn fto fts ftt gaa gaf gag gan gao gas gat gfa gff gfo gfs gft gga ggg ggn ggo ggs ggt gna gnf gnn gno gns gnt goa gof gog gon goo gos got gsa gsf gsg gsn gso gss gst gta gtf gtg gtn gto gts gtt naa naf nag nan nao nas nat nfa nff nfn nfo nfs nft nga ngf ngg ngn ngo ngs ngt nna nnf nng nnn nno nns nnt no- noa nof nog non noo nos not nsa nsf nsg nsn nso nss nst nta ntf ntg ntn nto nts ntt oaa oaf oag oan oao oas oat of- ofa off ofg ofn ofo ofs oft oga ogf ogg ogn ogo ogs ogt on- ona onf ong onn ono ons ont oo- ooa oof oog oon ooo oos oot os- osa osf osg osn oso oss ost ot- ota otf otg otn oto ots ott saa saf sag san sao sas sat sfa sff sfg sfn sfo sfs sft sga sgf sgg sgn sgo sgs sgt sna snf sng snn sno sns snt soa sof sog son soo sos sot ss- ssa ssf ssg ssn sso sss sst sta stf stg stn sto sts stt taa taf tag tan tao tas tat tfa tff tfg tfn tfo tfs tft tga tgf tgg tgn tgo tgs tgt tna tnf tng tnn tno tns tnt to- toa tof tog ton too tos tot tsa tsf tsg tsn tso tss tst tta ttf ttg ttn tto tts ttt