fidos ifdos fdios dfios idfos difos fiods ifods foids ofids iofds oifds fdois dfois fodis ofdis dofis odfis idofs diofs iodfs oidfs doifs odifs fidso ifdso fdiso dfiso idfso difso fisdo ifsdo fsido sfido isfdo sifdo fdsio dfsio fsdio sfdio dsfio sdfio idsfo disfo isdfo sidfo dsifo sdifo fiosd ifosd foisd ofisd iofsd oifsd fisod ifsod fsiod sfiod isfod sifod fosid ofsid fsoid sfoid osfid sofid iosfd oisfd isofd siofd osifd soifd fdosi dfosi fodsi ofdsi dofsi odfsi fdsoi dfsoi fsdoi sfdoi dsfoi sdfoi fosdi ofsdi fsodi sfodi osfdi sofdi dosfi odsfi dsofi sdofi osdfi sodfi idosf diosf iodsf oidsf doisf odisf idsof disof isdof sidof dsiof sdiof iosdf oisdf isodf siodf osidf soidf dosif odsif dsoif sdoif osdif sodif
Note: these 'words' (valid or invalid) are all the permutations of the word fidos. These words are obtained by scrambling the letters in fidos.