-ic c-- ccc cci ccr ccs cct ci- cic cii cir cis cit crc cri crr crs crt csc csi csr css cst ctc cti ctr cts ctt icc ici icr ics ict iic iii iir iis iit ir- irc iri irr irs irt is- isc isi isr iss ist itc iti its itt rcc rci rcr rcs rct ric rii rir ris rit rrc rri rrr rrs rrt rsc rsi rsr rss rst rtc rti rtr rts rtt scc sci scr scs sct sic sii sir sis sit sr- src sri srr srs srt ss- ssc ssi ssr sss sst stc sti str sts stt tcc tci tcr tcs tct tic tii tir tis tit trc tri trr trs trt tsc tsi tsr tss tst ttc tti ttr tts ttt