-ic c-- ccc ccf cci cck ccr cfc cff cfi cfk cfr ci- cic cif cii cik cir ckc cki crc crf cri crk crr fcc fcf fci fck fcr ffc fff ffi ffk ffr fic fif fii fik fir fkc fkf fki fkk frc frf fri frk frr i-f icc icf ici ick icr ifc iff ifi ifr iic iif iii iir ikc ikf iki ikk ikr ir- irc irf iri irk irr kcc kci kck kcr kfc kff kfi kic kif kii kik kir kkc kki kkk kkr krc krf kri krk krr rcc rcf rci rcr rfc rff rfi rfk rfr ric rif rii rik rir rkc rkf rkk rrc rrf rri rrk rrr