-ic c-- ccc cci cco ccp ccr ccs ci- cic cii cio cip cir cis co- coc coi coo cop cor cos cpc cpi cpo cpp cpr cps crc cri cro crp crr crs csc csi cso csp csr css icc ici ico icp icr ics iic iii iio iip iir iis io- ioc ioi ioo iop ior ios ipc ipi ipo ipp ipr ips ir- irc iri iro irp irr irs is- isc isi iso isp isr iss o-i oc- occ oci oco ocp ocr ocs oic oii oio oip oir ois oo- ooc ooi ooo oop oor oos op- opc opi opo opp opr ops or- orc ori oro orp orr ors os- osc osi oso osp osr oss p-p pcc pci pco pcp pcr pcs pic pii pio pip pir pis poc poi poo pop por pos ppc ppi ppo ppp ppr pps prc pri pro prp prr prs ps- psc psi pso psp psr pss rcc rci rco rcp rcr rcs ric rii rio rip rir ris roc roi roo rop ror ros rpc rpi rpo rpp rpr rps rrc rri rrp rrr rrs rsc rsi rso rsp rsr rss scc sci sco scp scr scs sic sii sio sip sir sis soc soi soo sop sor sos spc spi spo spp spr sps sr- src sri sro srp srr srs ss- ssc ssi sso ssp ssr sss