-ic c-- ccc cci cco ccr ccs ci- cic cii cio cir cis co- coc coi coo cor cos coy crc cri cro crr crs cry csc csi cso csr css csy cyc cyo cyr cys icc ici ico icr ics icy iic iii iio iir iis io- ioc ioi ioo ior ios ir- irc iri iro irr irs iry is- isc isi iso isr iss isy iyc iyo iyr iys iyy o-i oc- occ oci oco ocr ocs oic oii oio oir ois oo- ooc ooi ooo oor oos or- orc ori oro orr ors ory os- osc osi oso osr oss oyi oyo oys rcc rci rco rcr rcs ric rii rio rir ris riy roc roi roo ror ros roy rrc rri rrr rrs rsc rsi rso rsr rss ry- ryc ryo ryr rys ryy scc sci sco scr scs sic sii sio sir sis soc soi soo sor sos soy sr- src sri sro srr srs sry ss- ssc ssi sso ssr sss sy- syc syi syr sys ycc yci yco ycs ycy yii yio yir yis yoc yoi yoo yor yos yoy yrc yro yrs ysc ysi yso ysr yss ysy yyc yys yyy