a-a a-i a-t aaa aaf aag aai aao aas aat af- afa aff afg afi afo afs aft ag- aga agf agg agi ago ags agt ai- aia aif aig aii aio ais ait aoa aof aog aoi aoo aos aot as- asa asf asg asi aso ass ast at- ata atf atg ati ato ats att faa faf fag fai fao fas fat ffa fff ffg ffi ffo ffs fft fga fgf fgg fgi fgs fgt fia fif fig fii fis fit foa fof fog foi foo fos fot fsa fsf fsg fsi fso fss fst fta ftf ftg fti fto fts ftt gaa gaf gag gai gao gas gat gfa gff gfi gfo gfs gft gga ggg ggi ggo ggs ggt gia gif gig gii gio gis git goa gof gog goi goo gos got gsa gsf gsg gsi gso gss gst gta gtf gtg gti gto gts gtt i-f ia- iaa iaf iag iai iao ias iat ifa iff ifg ifi ifo ifs ift iga igf igg igi igo igs igt iia iif iii iio iis iit io- ioa iof iog ioi ioo ios iot is- isa isf isg isi iso iss ist ita itf itg iti ito its itt o-i oaa oaf oag oai oao oas oat of- ofa off ofg ofi ofo ofs oft oga ogf ogg ogi ogo ogs ogt oia oif oii oio ois oit oo- ooa oof oog ooi ooo oos oot os- osa osf osg osi oso oss ost ot- ota otf otg oti oto ots ott saa saf sag sai sao sas sat sfa sff sfg sfi sfo sfs sft sga sgf sgg sgi sgo sgs sgt sia sif sig sii sio sis sit soa sof sog soi soo sos sot ss- ssa ssf ssg ssi sso sss sst sta stf stg sti sto sts stt taa taf tag tai tao tas tat tfa tff tfg tfi tfo tfs tft tga tgf tgg tgi tgo tgs tgt tia tif tig tii tio tis tit to- toa tof tog toi too tos tot tsa tsf tsg tsi tso tss tst tta ttf ttg tti tto tts ttt