a-a a-i aaa aaf aag aai aay af- afa aff afg afi afy ag- aga agf agg agi agy ai- aia aif aig aii aiy ay- aya ayf ayi faa faf fag fai fay ffa fff ffg ffi ffy fga fgf fgg fgi fia fif fig fii fy- fya fyi gaa gaf gag gai gay gfa gff gfi gfy gga ggg ggi gia gif gig gii giy gy- gya gyf i-f ia- iaa iaf iag iai ifa iff ifg ifi ify iga igf igg igi igy iia iif iii iya iyy yaa yaf yag yai yay yfa yff yga yif yig yii yyf yyg yyy