-ic c-- ccc cci cck cco ccp ccr cct ci- cic cii cik cio cip cir cit ckc cki cko ckt co- coc coi cok coo cop cor cot cpc cpi cpk cpo cpp cpr cpt crc cri crk cro crp crr crt ctc cti ctk cto ctp ctr ctt icc ici ick ico icp icr ict iic iii iio iip iir iit ikc iki ikk iko ikr ikt io- ioc ioi ioo iop ior iot ipc ipi ipo ipp ipr ipt ir- irc iri irk iro irp irr irt itc iti itk ito itp itt k-t kcc kci kck kcp kcr kct kic kii kik kio kip kir kit kkc kki kkk kkp kkr kkt koc koi kok koo kop kor kot kpc kpi kpk kpo kpp kpr kpt krc kri krk kro krp krr krt ktc ktk kto ktp ktr ktt o-i oc- occ oci ock oco ocp ocr oct oic oii oik oio oip oir oit okc oki okk oko okp okr oo- ooc ooi ook ooo oop oor oot op- opc opi opk opo opp opr opt or- orc ori ork oro orp orr ort ot- otc oti otk oto otp otr ott p-p pcc pci pck pco pcp pcr pct pic pii pik pio pip pir pit pkc pki pko pkp pkr pkt poc poi pok poo pop por pot ppc ppi ppk ppo ppp ppr ppt prc pri prk pro prp prr prt pt- ptc pti ptk pto ptp ptr ptt rcc rci rco rcp rcr rct ric rii rik rio rip rir rit rkc rkk rko rkp rkt roc roi rok roo rop ror rot rpc rpi rpk rpo rpp rpr rpt rrc rri rrk rrp rrr rrt rtc rti rtk rto rtp rtr rtt tcc tci tck tco tcp tcr tct tic tii tik tio tip tir tit tkc tkk tko tkp tkr tkt to- toc toi tok too top tor tot tpc tpi tpk tpo tpp tpr tpt trc tri trk tro trp trr trt ttc tti ttk tto ttp ttr ttt