c-- ccc ccf cco ccp ccr cct cfc cff cfo cfp cfr cft co- coc cof coo cop cor cot coy cpc cpf cpo cpp cpr cpt crc crf cro crp crr crt cry ctc ctf cto ctp ctr ctt cty cyc cyf cyo cyp cyr cyt fcc fcf fco fcp fcr fct fcy ffc fff ffo ffp ffr fft ffy foc fof foo fop for fot foy fpc fpo fpp fpr fpt fpy frc frf fro frp frr frt fry ftc ftf fto ftp ftr ftt fty fy- fyc fyo fyp oc- occ ocf oco ocp ocr oct of- ofc off ofo ofp ofr oft oo- ooc oof ooo oop oor oot op- opc opf opo opp opr opt opy or- orc orf oro orp orr ort ory ot- otc otf oto otp otr ott oyo p-p pcc pcf pco pcp pcr pct pfc pff pfo pfp pfr pft pfy poc pof poo pop por pot poy ppc ppf ppo ppp ppr ppt prc prf pro prp prr prt pry pt- ptc ptf pto ptp ptr ptt pty py- pyc pyf pyo pyr pyt rcc rcf rco rcp rcr rct rfc rff rfo rfp rfr rft roc rof roo rop ror rot roy rpc rpf rpo rpp rpr rpt rrc rrf rrp rrr rrt rtc rtf rto rtp rtr rtt rty ry- ryc ryf ryo ryr ryy tcc tcf tco tcp tcr tct tfc tff tfo tfp tfr tft to- toc tof too top tor tot toy tpc tpf tpo tpp tpr tpt trc trf tro trp trr trt try ttc ttf tto ttp ttr ttt tty tyc tyf tyo typ tyr tyt ycc ycf yco ycp ycy yfc yff yfr yft yoc yof yoo yop yor yot yoy ypf ypo yrc yrf yro yrp yrt ytc ytf yto ytp ytr ytt yyc yyf yyt yyy