a-a aaa aaf aag aao aar aay af- afa aff afg afo afr afy ag- aga agf agg ago agr agy aoa aof aog aoo aor ar- ara arf arg aro arr ary ay- aya ayf ayo ayr faa faf fag fao far fay ffa fff ffg ffo ffr ffy fga fgf fgg fgr foa fof fog foo for foy fra frf frg fro frr fry fy- fya fyo gaa gaf gag gao gar gay gfa gff gfo gfr gfy gga ggg ggo ggr goa gof gog goo gor goy gra grf grg gro grr gry gy- gya gyf gyo gyr oaa oaf oag oao oar of- ofa off ofg ofo ofr oga ogf ogg ogo ogy oo- ooa oof oog ooo oor or- ora orf org oro orr ory oya oyo ra- raa raf rag rao rar ray rfa rff rfg rfo rfr rga rgf rgg rgo rgr roa rof rog roo ror roy rra rrf rrg rrr ry- rya ryf ryg ryo ryr ryy yaa yaf yag yao yar yay yfa yff yfr yga ygo yof yog yoo yor yoy yra yrf yrg yro yyf yyg yyy