c-- ccc ccd ccn cco ccr cdc cdd cdn cdo cdr cdy cn- cnc cnd cnn cno cnr cny co- coc cod con coo cor coy crc crd crn cro crr cry cyc cyd cyn cyo cyr dcc dcd dcn dco dcr ddc ddd ddn ddo ddr ddy dnc dnd dnn dno dnr dny doc dod don doo dor doy drc drd drn dro drr dry dy- dyc dyd dyn dyo dyr dyy ncc ncd ncn nco ncr ndc ndd ndn ndo ndr ndy nnc nnn nno no- noc nod non noo nor noy nrc nrd nrn nro nrr nry nyc nyd nyn nyo nyy oc- occ ocd ocn oco ocr odc odd odn odo odr on- onc ond onn ono onr ony oo- ooc ood oon ooo oor or- orc ord orn oro orr ory oyd oyo rcc rcd rcn rco rcr rdc rdd rdn rdo rdr rdy rnc rnd rnn rno rnr rny roc rod ron roo ror roy rrc rrd rrn rrr ry- ryc ryd ryn ryo ryr ryy ycc ycd yco ycy ydn ydo ydy ynd ynn yny yoc yod yon yoo yor yoy yrc yrn yro yyc yyy