c-- ccc ccd cco ccr cct ccw cdc cdd cdo cdr cdt cdw co- coc cod coo cor cot cow crc crd cro crr crt crw ctc ctd cto ctr ctt ctw cw- cwc cwd cwo cwr cwt dcc dcd dco dcr dct dcw ddc ddd ddo ddr ddt ddw doc dod doo dor dot dow drc drd dro drr drt drw dtc dtd dto dtr dtt dtw dwc dwo dwr dwt dww oc- occ ocd oco ocr oct ocw odc odd odo odr odt oo- ooc ood ooo oor oot oow or- orc ord oro orr ort ot- otc otd oto otr ott otw owc owd owo owt oww rcc rcd rco rcr rct rcw rdc rdd rdo rdr rdt roc rod roo ror rot row rrc rrd rrr rrt rtc rtd rto rtr rtt rtw rwc rwd rwr tcc tcd tco tcr tct tcw tdc tdd tdo tdr tdt tdw to- toc tod too tor tot tow trc trd tro trr trt trw ttc ttd tto ttr ttt ttw twc twd two twr twt tww wcc wcd wco wcr wct wcw wdc wdr wdt woc wod woo wor wot wow wr- wrc wrd wro wrr wrt wrw wtc wtd wto wtr wtt wtw wwc wwd wwo wwt www