eee eef eeo ees eew ef- efe eff efo efs efw eo- eoe eof eoo eos eow es- ese esf eso ess esw ewe ewf ewo ews eww fee fef feo fes few ffe fff ffo ffs ffw foe fof foo fos fow fse fsf fso fss fsw fwe fwf fwo fws oee oef oeo oes of- ofe off ofo ofs ofw oo- oof ooo oos oow os- ose osf oso oss osw owe owf owo ows oww se- see sef seo ses sew sfe sff sfo sfs sfw soe sof soo sos sow ss- sse ssf sso sss ssw swe swf swo sws wee wef weo wes wew wfe wff wfo wfs wfw woe wof woo wos wow wse wsf wso wss wsw wwe wwf wwo www