-ic c-- ccc cci ccr ccs cct ci- cic cii cir cis cit crc cri crr crs crt cry csc csi csr css cst csy ctc cti ctr cts ctt cty cyc cyr cys cyt icc ici icr ics ict icy iic iii iir iis iit ir- irc iri irr irs irt iry is- isc isi isr iss ist isy itc iti its itt ity iyc iyr iys iyt iyy rcc rci rcr rcs rct ric rii rir ris rit riy rrc rri rrr rrs rrt rsc rsi rsr rss rst rtc rti rtr rts rtt rty ry- ryc ryr rys ryy scc sci scr scs sct sic sii sir sis sit sr- src sri srr srs srt sry ss- ssc ssi ssr sss sst stc sti str sts stt sty sy- syc syi syr sys syt tcc tci tcr tcs tct tic tii tir tis tit tiy trc tri trr trs trt try tsc tsi tsr tss tst tsy ttc tti ttr tts ttt tty tyc tyr tys tyt ycc yci ycs ycy yii yir yis yit yrc yrs yrt ysc ysi ysr yss yst ysy ytc ytr yts ytt yyc yys yyt yyy