a-a a-i a-t aaa aaf aag aai aan aas aat af- afa aff afg afi afn afs aft ag- aga agf agg agi agn ags agt ai- aia aif aig aii ain ais ait an- ana anf ang ani ann ans ant as- asa asf asg asi asn ass ast at- ata atf atg ati atn ats att faa faf fag fai fan fas fat ffa fff ffg ffi ffn ffs fft fga fgf fgg fgi fgn fgs fgt fia fif fig fii fin fis fit fna fnf fng fni fnn fns fnt fsa fsf fsg fsi fsn fss fst fta ftf ftg fti ftn fts ftt gaa gaf gag gai gan gas gat gfa gff gfi gfs gft gga ggg ggi ggn ggs ggt gia gif gig gii gin gis git gna gnf gni gnn gns gnt gsa gsf gsg gsi gsn gss gst gta gtf gtg gti gtn gts gtt i-f ia- iaa iaf iag iai ian ias iat ifa iff ifg ifi ifn ifs ift iga igf igg igi ign igs igt iia iif iii iin iis iit in- ina inf ing ini inn ins int is- isa isf isg isi isn iss ist ita itf itg iti itn its itt n-i naa naf nag nai nan nas nat nfa nff nfi nfn nfs nft nga ngf ngg ngi ngn ngs ngt nia nif nig nii nin nis nit nna nnf nng nni nnn nns nnt nsa nsf nsg nsi nsn nss nst nta ntf ntg nti ntn nts ntt saa saf sag sai san sas sat sfa sff sfg sfi sfn sfs sft sga sgf sgg sgi sgn sgs sgt sia sif sig sii sin sis sit sna snf sng sni snn sns snt ss- ssa ssf ssg ssi ssn sss sst sta stf stg sti stn sts stt taa taf tag tai tan tas tat tfa tff tfg tfi tfn tfs tft tga tgf tgg tgi tgn tgs tgt tia tif tig tii tin tis tit tna tnf tng tni tnn tns tnt tsa tsf tsg tsi tsn tss tst tta ttf ttg tti ttn tts ttt