-ic c-- ccc ccf cci cck cco ccr ccs cct cfc cff cfi cfk cfo cfr cfs cft ci- cic cif cii cik cio cir cis cit ckc cki cko cks ckt co- coc cof coi cok coo cor cos cot crc crf cri crk cro crr crs crt csc csf csi csk cso csr css cst ctc ctf cti ctk cto ctr cts ctt fcc fcf fci fck fco fcr fcs fct ffc fff ffi ffk ffo ffr ffs fft fic fif fii fik fir fis fit fkc fkf fki fkk fkt foc fof foi fok foo for fos fot frc frf fri frk fro frr frs frt fsc fsf fsi fsk fso fsr fss fst ftc ftf fti ftk fto ftr fts ftt i-f icc icf ici ick ico icr ics ict ifc iff ifi ifo ifr ifs ift iic iif iii iio iir iis iit ikc ikf iki ikk iko ikr iks ikt io- ioc iof ioi ioo ior ios iot ir- irc irf iri irk iro irr irs irt is- isc isf isi isk iso isr iss ist itc itf iti itk ito its itt k-t kcc kci kck kcr kcs kct kfc kff kfi kfo kfs kic kif kii kik kio kir kis kit kkc kki kkk kkr kks kkt koc kof koi kok koo kor kos kot krc krf kri krk kro krr krs krt ksc ksf ksi ksk kso ksr kss kst ktc ktf ktk kto ktr kts ktt o-i oc- occ ocf oci ock oco ocr ocs oct of- ofc off ofi ofo ofr ofs oft oic oif oii oik oio oir ois oit okc oki okk oko okr oks oo- ooc oof ooi ook ooo oor oos oot or- orc orf ori ork oro orr ors ort os- osc osf osi osk oso osr oss ost ot- otc otf oti otk oto otr ots ott rcc rcf rci rco rcr rcs rct rfc rff rfi rfk rfo rfr rfs rft ric rif rii rik rio rir ris rit rkc rkf rkk rko rks rkt roc rof roi rok roo ror ros rot rrc rrf rri rrk rrr rrs rrt rsc rsf rsi rsk rso rsr rss rst rtc rtf rti rtk rto rtr rts rtt scc scf sci sck sco scr scs sct sfc sff sfi sfk sfo sfr sfs sft sic sif sii sik sio sir sis sit sk- skc skf ski skk sko skr sks skt soc sof soi sok soo sor sos sot sr- src srf sri srk sro srr srs srt ss- ssc ssf ssi ssk sso ssr sss sst stc stf sti stk sto str sts stt tcc tcf tci tck tco tcr tcs tct tfc tff tfi tfk tfo tfr tfs tft tic tif tii tik tio tir tis tit tkc tkk tko tkr tks tkt to- toc tof toi tok too tor tos tot trc trf tri trk tro trr trs trt tsc tsf tsi tsk tso tsr tss tst ttc ttf tti ttk tto ttr tts ttt