ddd ddf ddk ddo ddr ddw dfd dff dfk dfo dfr dfw dkk dko dkr dkw dod dof dok doo dor dow drd drk dro drr drw dwf dwo dwr dww fdd fdf fdk fdo fdr ffd fff ffk ffo ffr ffw fkf fkk fof fok foo for fow frd frf frk fro frr frw fwd fwf fwo kdf kdk kdo kdr kfd kff kfo kfw kkk kkr kod kof kok koo kor kow krd krf krk kro krr krw kw- kwd kwf kwk kwo kww odd odf odo odr of- ofd off ofo ofr ofw okd okk oko okr okw oo- ood oof ook ooo oor oow or- ord orf ork oro orr owd owf owk owo oww rdd rdf rdo rdr rfd rff rfk rfo rfr rfw rkf rkk rko rod rof rok roo ror row rrd rrf rrk rrr rwd rwf rwr wdf wdr wfd wff wfk wfo wfr wfw wkd wkf wko wkr wkw wod wof wok woo wor wow wr- wrd wrf wrk wro wrr wrw wwd wwf wwo www