-ic c-- ccc cci cck cco ccr ci- cic cii cik cio cir ckc cki cko cky co- coc coi cok coo cor coy crc cri crk cro crr cry cyc cyk cyo cyr icc ici ick ico icr icy iic iii iio iir ikc iki ikk iko ikr io- ioc ioi ioo ior ir- irc iri irk iro irr iry iyc iyo iyr iyy kcc kci kck kcr kic kii kik kio kir kkc kki kkk kkr kky koc koi kok koo kor koy krc kri krk kro krr kry kyc kyo kyr o-i oc- occ oci ock oco ocr oic oii oik oio oir okc oki okk oko okr oo- ooc ooi ook ooo oor or- orc ori ork oro orr ory oyi oyo rcc rci rco rcr ric rii rik rio rir riy rkc rkk rko rky roc roi rok roo ror roy rrc rri rrk rrr ry- ryc ryk ryo ryr ryy ycc yci yco ycy yii yio yir yki ykk yoc yoi yok yoo yor yoy yrc yro yyc yyy