a-a a-i a-t aaa aaf aag aai aat af- afa aff afg afi aft ag- aga agf agg agi agt ai- aia aif aig aii ait at- ata atf atg ati att faa faf fag fai fat ffa fff ffg ffi fft fga fgf fgg fgi fgt fia fif fig fii fit fta ftf ftg fti ftt gaa gaf gag gai gat gfa gff gfi gft gga ggg ggi ggt gia gif gig gii git gta gtf gtg gti gtt i-f ia- iaa iaf iag iai iat ifa iff ifg ifi ift iga igf igg igi igt iia iif iii iit ita itf itg iti itt taa taf tag tai tat tfa tff tfg tfi tft tga tgf tgg tgi tgt tia tif tig tii tit tta ttf ttg tti ttt