-ic c-- ccc ccf cci cco ccr ccs cfc cff cfi cfo cfr cfs ci- cic cif cii cio cir cis co- coc cof coi coo cor cos coy crc crf cri cro crr crs cry csc csf csi cso csr css csy cyc cyf cyo cyr cys fcc fcf fci fco fcr fcs fcy ffc fff ffi ffo ffr ffs ffy fic fif fii fir fis foc fof foi foo for fos foy frc frf fri fro frr frs fry fsc fsf fsi fso fsr fss fy- fyc fyi fyo i-f icc icf ici ico icr ics icy ifc iff ifi ifo ifr ifs ify iic iif iii iio iir iis io- ioc iof ioi ioo ior ios ir- irc irf iri iro irr irs iry is- isc isf isi iso isr iss isy iyc iyo iyr iys iyy o-i oc- occ ocf oci oco ocr ocs of- ofc off ofi ofo ofr ofs oic oif oii oio oir ois oo- ooc oof ooi ooo oor oos or- orc orf ori oro orr ors ory os- osc osf osi oso osr oss oyi oyo oys rcc rcf rci rco rcr rcs rfc rff rfi rfo rfr rfs ric rif rii rio rir ris riy roc rof roi roo ror ros roy rrc rrf rri rrr rrs rsc rsf rsi rso rsr rss ry- ryc ryf ryo ryr rys ryy scc scf sci sco scr scs sfc sff sfi sfo sfr sfs sic sif sii sio sir sis soc sof soi soo sor sos soy sr- src srf sri sro srr srs sry ss- ssc ssf ssi sso ssr sss sy- syc syi syr sys ycc ycf yci yco ycs ycy yfc yff yfr yfs yif yii yio yir yis yoc yof yoi yoo yor yos yoy yrc yrf yro yrs ysc ysi yso ysr yss ysy yyc yyf yys yyy