-ic c-- ccc ccf cci cco ccp ccr ccs cfc cff cfi cfo cfp cfr cfs ci- cic cif cii cio cip cir cis co- coc cof coi coo cop cor cos cpc cpf cpi cpo cpp cpr cps crc crf cri cro crp crr crs csc csf csi cso csp csr css fcc fcf fci fco fcp fcr fcs ffc fff ffi ffo ffp ffr ffs fic fif fii fip fir fis foc fof foi foo fop for fos fpc fpi fpo fpp fpr fps frc frf fri fro frp frr frs fsc fsf fsi fso fsp fsr fss i-f icc icf ici ico icp icr ics ifc iff ifi ifo ifp ifr ifs iic iif iii iio iip iir iis io- ioc iof ioi ioo iop ior ios ipc ipf ipi ipo ipp ipr ips ir- irc irf iri iro irp irr irs is- isc isf isi iso isp isr iss o-i oc- occ ocf oci oco ocp ocr ocs of- ofc off ofi ofo ofp ofr ofs oic oif oii oio oip oir ois oo- ooc oof ooi ooo oop oor oos op- opc opf opi opo opp opr ops or- orc orf ori oro orp orr ors os- osc osf osi oso osp osr oss p-p pcc pcf pci pco pcp pcr pcs pfc pff pfi pfo pfp pfr pfs pic pif pii pio pip pir pis poc pof poi poo pop por pos ppc ppf ppi ppo ppp ppr pps prc prf pri pro prp prr prs ps- psc psf psi pso psp psr pss rcc rcf rci rco rcp rcr rcs rfc rff rfi rfo rfp rfr rfs ric rif rii rio rip rir ris roc rof roi roo rop ror ros rpc rpf rpi rpo rpp rpr rps rrc rrf rri rrp rrr rrs rsc rsf rsi rso rsp rsr rss scc scf sci sco scp scr scs sfc sff sfi sfo sfp sfr sfs sic sif sii sio sip sir sis soc sof soi soo sop sor sos spc spf spi spo spp spr sps sr- src srf sri sro srp srr srs ss- ssc ssf ssi sso ssp ssr sss