-ic c-- ccc cci ccp ccr ccs ccx ci- cic cii cip cir cis cix cpc cpi cpp cpr cps cpx crc cri crp crr crs crx csc csi csp csr css csx cxc cxi cxp cxr cxs cxx icc ici icp icr ics iic iii iip iir iis iix ipc ipi ipp ipr ips ipx ir- irc iri irp irr irs irx is- isc isi isp isr iss ixc ixi p-p pcc pci pcp pcr pcs pcx pic pii pip pir pis pix ppc ppi ppp ppr pps ppx prc pri prp prr prs prx ps- psc psi psp psr pss psx pxc pxr pxs rcc rci rcp rcr rcs rcx ric rii rip rir ris rix rpc rpi rpp rpr rps rpx rrc rri rrp rrr rrs rsc rsi rsp rsr rss rsx rxp rxr rxs scc sci scp scr scs scx sic sii sip sir sis six spc spi spp spr sps spx sr- src sri srp srr srs srx ss- ssc ssi ssp ssr sss ssx sxc sxi sxs xci xcp xcr xcx xic xii xis xix xpc xpp xps xrc xrx xsc xsi xsp xss xxi xxp xxx