c-- ccc ccd ccn cco ccr cct cdc cdd cdn cdo cdr cdt cdy cn- cnc cnd cnn cno cnr cnt cny co- coc cod con coo cor cot coy crc crd crn cro crr crt cry ctc ctd ctn cto ctr ctt cty cyc cyd cyn cyo cyr cyt dcc dcd dcn dco dcr dct ddc ddd ddn ddo ddr ddt ddy dnc dnd dnn dno dnr dnt dny doc dod don doo dor dot doy drc drd drn dro drr drt dry dtc dtd dtn dto dtr dtt dty dy- dyc dyd dyn dyo dyr dyy ncc ncd ncn nco ncr nct ndc ndd ndn ndo ndr ndt ndy nnc nnn nno nnt no- noc nod non noo nor not noy nrc nrd nrn nro nrr nrt nry ntc ntd ntn nto ntr ntt nyc nyd nyn nyo nyt nyy oc- occ ocd ocn oco ocr oct odc odd odn odo odr odt on- onc ond onn ono onr ont ony oo- ooc ood oon ooo oor oot or- orc ord orn oro orr ort ory ot- otc otd otn oto otr ott oyd oyo rcc rcd rcn rco rcr rct rdc rdd rdn rdo rdr rdt rdy rnc rnd rnn rno rnr rnt rny roc rod ron roo ror rot roy rrc rrd rrn rrr rrt rtc rtd rtn rto rtr rtt rty ry- ryc ryd ryn ryo ryr ryy tcc tcd tcn tco tcr tct tdc tdd tdn tdo tdr tdt tdy tnc tnd tnn tno tnr tnt to- toc tod ton too tor tot toy trc trd trn tro trr trt try ttc ttd ttn tto ttr ttt tty tyc tyd tyn tyo tyr tyt ycc ycd yco ycy ydn ydo ydt ydy ynd ynn yny yoc yod yon yoo yor yot yoy yrc yrn yro yrt ytc ytd ytn yto ytr ytt yyc yyt yyy