-ic c-- ccc ccf cci cco ccr cfc cff cfi cfo cfr ci- cic cif cii cio cir co- coc cof coi coo cor crc crf cri cro crr fcc fcf fci fco fcr ffc fff ffi ffo ffr fic fif fii fir foc fof foi foo for frc frf fri fro frr i-f icc icf ici ico icr ifc iff ifi ifo ifr iic iif iii iio iir io- ioc iof ioi ioo ior ir- irc irf iri iro irr o-i oc- occ ocf oci oco ocr of- ofc off ofi ofo ofr oic oif oii oio oir oo- ooc oof ooi ooo oor or- orc orf ori oro orr rcc rcf rci rco rcr rfc rff rfi rfo rfr ric rif rii rio rir roc rof roi roo ror rrc rrf rri rrr