c-- ccc ccf cco ccr ccs cct ccw cfc cff cfo cfr cfs cft cfw co- coc cof coo cor cos cot cow crc crf cro crr crs crt crw csc csf cso csr css cst csw ctc ctf cto ctr cts ctt ctw cw- cwc cwo cwr cws cwt fcc fcf fco fcr fcs fct fcw ffc fff ffo ffr ffs fft ffw foc fof foo for fos fot fow frc frf fro frr frs frt frw fsc fsf fso fsr fss fst fsw ftc ftf fto ftr fts ftt ftw fwc fwf fwo fws fwt oc- occ ocf oco ocr ocs oct ocw of- ofc off ofo ofr ofs oft ofw oo- ooc oof ooo oor oos oot oow or- orc orf oro orr ors ort os- osc osf oso osr oss ost osw ot- otc otf oto otr ots ott otw owc owf owo ows owt oww rcc rcf rco rcr rcs rct rcw rfc rff rfo rfr rfs rft rfw roc rof roo ror ros rot row rrc rrf rrr rrs rrt rsc rsf rso rsr rss rst rsw rtc rtf rto rtr rts rtt rtw rwc rwf rwr rws scc scf sco scr scs sct scw sfc sff sfo sfr sfs sft sfw soc sof soo sor sos sot sow sr- src srf sro srr srs srt srw ss- ssc ssf sso ssr sss sst ssw stc stf sto str sts stt stw swc swf swo swr sws swt tcc tcf tco tcr tcs tct tcw tfc tff tfo tfr tfs tft tfw to- toc tof too tor tos tot tow trc trf tro trr trs trt trw tsc tsf tso tsr tss tst tsw ttc ttf tto ttr tts ttt ttw twc twf two twr tws twt tww wcc wcf wco wcr wcs wct wcw wfc wff wfo wfr wfs wft wfw woc wof woo wor wos wot wow wr- wrc wrf wro wrr wrs wrt wrw wsc wsf wso wsr wss wst wsw wtc wtf wto wtr wts wtt wtw wwc wwf wwo wwt www