c-- ccc ccd ccg cco ccr cdc cdd cdg cdo cdr cdy cgc cgd cgg cgo cgr cgy co- coc cod cog coo cor coy crc crd crg cro crr cry cyc cyd cyg cyo cyr dcc dcd dcg dco dcr ddc ddd ddg ddo ddr ddy dgc dgd dgg dgr doc dod dog doo dor doy drc drd drg dro drr dry dy- dyc dyd dyo dyr dyy g-d gcc gcd gcg gco gcr gdc gdd gdo gdr ggc ggd ggg ggo ggr goc god gog goo gor goy grc grd grg gro grr gry gy- gyd gyo gyr oc- occ ocd ocg oco ocr odc odd odg odo odr ogc ogd ogg ogo ogy oo- ooc ood oog ooo oor or- orc ord org oro orr ory oyd oyo rcc rcd rcg rco rcr rdc rdd rdg rdo rdr rdy rgc rgd rgg rgo rgr roc rod rog roo ror roy rrc rrd rrg rrr ry- ryc ryd ryg ryo ryr ryy ycc ycd yco ycy ydg ydo ydy ygc ygo yoc yod yog yoo yor yoy yrc yrg yro yyc yyg yyy