a-a a-c aaa aac aad aaf aao aar aay ac- aca acc acd acf aco acr acy ad- ada adc add adf ado adr ady af- afa afc afd aff afo afr afy aoa aoc aod aof aoo aor ar- ara arc ard arf aro arr ary ay- aya ayc ayd ayf ayo ayr c-- caa cac cad caf cao car cay cca ccc ccd ccf cco ccr cda cdc cdd cdf cdo cdr cdy cfa cfc cfd cff cfo cfr co- coa coc cod cof coo cor coy cra crc crd crf cro crr cry cya cyc cyd cyf cyo cyr daa dac dad daf dao dar day dca dcc dcd dcf dco dcr dda ddc ddd ddf ddo ddr ddy dfa dfc dfd dff dfo dfr doa doc dod dof doo dor doy dra drc drd dro drr dry dy- dya dyc dyd dyo dyr dyy faa fac fad faf fao far fay fca fcc fcd fcf fco fcr fcy fda fdc fdd fdf fdo fdr ffa ffc ffd fff ffo ffr ffy foa foc fof foo for foy fra frc frd frf fro frr fry fy- fya fyc fyo oaa oac oad oaf oao oar oc- oca occ ocd ocf oco ocr oda odc odd odf odo odr of- ofa ofc ofd off ofo ofr oo- ooa ooc ood oof ooo oor or- ora orc ord orf oro orr ory oya oyd oyo ra- raa rac rad raf rao rar ray rca rcc rcd rcf rco rcr rda rdc rdd rdf rdo rdr rdy rfa rfc rfd rff rfo rfr roa roc rod rof roo ror roy rra rrc rrd rrf rrr ry- rya ryc ryd ryf ryo ryr ryy yaa yac yad yaf yao yar yay yca ycc ycd ycf yco ycy yda ydo ydy yfa yfc yfd yff yfr yoc yod yof yoo yor yoy yra yrc yrf yro yyc yyf yyy