-ic c-- ccc ccf cci cco ccr ccs cct cfc cff cfi cfo cfr cfs cft ci- cic cif cii cio cir cis cit co- coc cof coi coo cor cos cot crc crf cri cro crr crs crt csc csf csi cso csr css cst ctc ctf cti cto ctr cts ctt fcc fcf fci fco fcr fcs fct ffc fff ffi ffo ffr ffs fft fic fif fii fir fis fit foc fof foi foo for fos fot frc frf fri fro frr frs frt fsc fsf fsi fso fsr fss fst ftc ftf fti fto ftr fts ftt i-f icc icf ici ico icr ics ict ifc iff ifi ifo ifr ifs ift iic iif iii iio iir iis iit io- ioc iof ioi ioo ior ios iot ir- irc irf iri iro irr irs irt is- isc isf isi iso isr iss ist itc itf iti ito its itt o-i oc- occ ocf oci oco ocr ocs oct of- ofc off ofi ofo ofr ofs oft oic oif oii oio oir ois oit oo- ooc oof ooi ooo oor oos oot or- orc orf ori oro orr ors ort os- osc osf osi oso osr oss ost ot- otc otf oti oto otr ots ott rcc rcf rci rco rcr rcs rct rfc rff rfi rfo rfr rfs rft ric rif rii rio rir ris rit roc rof roi roo ror ros rot rrc rrf rri rrr rrs rrt rsc rsf rsi rso rsr rss rst rtc rtf rti rto rtr rts rtt scc scf sci sco scr scs sct sfc sff sfi sfo sfr sfs sft sic sif sii sio sir sis sit soc sof soi soo sor sos sot sr- src srf sri sro srr srs srt ss- ssc ssf ssi sso ssr sss sst stc stf sti sto str sts stt tcc tcf tci tco tcr tcs tct tfc tff tfi tfo tfr tfs tft tic tif tii tio tir tis tit to- toc tof toi too tor tos tot trc trf tri tro trr trs trt tsc tsf tsi tso tsr tss tst ttc ttf tti tto ttr tts ttt