duffed udffed dfufed fdufed ufdfed fudfed duffed udffed dfufed fdufed ufdfed fudfed dffued fdfued dffued fdfued ffdued ffdued uffded fufded uffded fufded ffuded ffuded dufefd udfefd dfuefd fduefd ufdefd fudefd dueffd udeffd deuffd eduffd uedffd eudffd dfeufd fdeufd defufd edfufd fedufd efdufd ufedfd fuedfd uefdfd eufdfd feudfd efudfd dufefd udfefd dfuefd fduefd ufdefd fudefd dueffd udeffd deuffd eduffd uedffd eudffd dfeufd fdeufd defufd edfufd fedufd efdufd ufedfd fuedfd uefdfd eufdfd feudfd efudfd dffeud fdfeud dffeud fdfeud ffdeud ffdeud dfefud fdefud deffud edffud fedfud efdfud dfefud fdefud deffud edffud fedfud efdfud ffedud ffedud fefdud effdud fefdud effdud uffedd fufedd uffedd fufedd ffuedd ffuedd ufefdd fuefdd ueffdd euffdd feufdd efufdd ufefdd fuefdd ueffdd euffdd feufdd efufdd ffeudd ffeudd fefudd effudd fefudd effudd duffde udffde dfufde fdufde ufdfde fudfde duffde udffde dfufde fdufde ufdfde fudfde dffude fdfude dffude fdfude ffdude ffdude uffdde fufdde uffdde fufdde ffudde ffudde dufdfe udfdfe dfudfe fdudfe ufddfe fuddfe dudffe uddffe dduffe dduffe uddffe dudffe dfdufe fddufe ddfufe ddfufe fddufe dfdufe ufddfe fuddfe udfdfe dufdfe fdudfe dfudfe dufdfe udfdfe dfudfe fdudfe ufddfe fuddfe dudffe uddffe dduffe dduffe uddffe dudffe dfdufe fddufe ddfufe ddfufe fddufe dfdufe ufddfe fuddfe udfdfe dufdfe fdudfe dfudfe dffdue fdfdue dffdue fdfdue ffddue ffddue dfdfue fddfue ddffue ddffue fddfue dfdfue dfdfue fddfue ddffue ddffue fddfue dfdfue ffddue ffddue fdfdue dffdue fdfdue dffdue uffdde fufdde uffdde fufdde ffudde ffudde ufdfde fudfde udffde duffde fdufde dfufde ufdfde fudfde udffde duffde fdufde dfufde ffdude ffdude fdfude dffude fdfude dffude dufedf udfedf dfuedf fduedf ufdedf fudedf duefdf udefdf deufdf edufdf uedfdf eudfdf dfeudf fdeudf defudf edfudf fedudf efdudf ufeddf fueddf uefddf eufddf feuddf efuddf dufdef udfdef dfudef fdudef ufddef fuddef dudfef uddfef ddufef ddufef uddfef dudfef dfduef fdduef ddfuef ddfuef fdduef dfduef ufddef fuddef udfdef dufdef fdudef dfudef duedff udedff deudff edudff ueddff euddff dudeff uddeff ddueff ddueff uddeff dudeff deduff edduff ddeuff ddeuff edduff deduff ueddff euddff udedff duedff edudff deudff dfeduf fdeduf defduf edfduf fedduf efdduf dfdeuf fddeuf ddfeuf ddfeuf fddeuf dfdeuf dedfuf eddfuf ddefuf ddefuf eddfuf dedfuf fedduf efdduf fdeduf dfeduf edfduf defduf ufeddf fueddf uefddf eufddf feuddf efuddf ufdedf fudedf udfedf dufedf fduedf dfuedf uedfdf eudfdf udefdf duefdf edufdf deufdf fedudf efdudf fdeudf dfeudf edfudf defudf dufedf udfedf dfuedf fduedf ufdedf fudedf duefdf udefdf deufdf edufdf uedfdf eudfdf dfeudf fdeudf defudf edfudf fedudf efdudf ufeddf fueddf uefddf eufddf feuddf efuddf dufdef udfdef dfudef fdudef ufddef fuddef dudfef uddfef ddufef ddufef uddfef dudfef dfduef fdduef ddfuef ddfuef fdduef dfduef ufddef fuddef udfdef dufdef fdudef dfudef duedff udedff deudff edudff ueddff euddff dudeff uddeff ddueff ddueff uddeff dudeff deduff edduff ddeuff ddeuff edduff deduff ueddff euddff udedff duedff edudff deudff dfeduf fdeduf defduf edfduf fedduf efdduf dfdeuf fddeuf ddfeuf ddfeuf fddeuf dfdeuf dedfuf eddfuf ddefuf ddefuf eddfuf dedfuf fedduf efdduf fdeduf dfeduf edfduf defduf ufeddf fueddf uefddf eufddf feuddf efuddf ufdedf fudedf udfedf dufedf fduedf dfuedf uedfdf eudfdf udefdf duefdf edufdf deufdf fedudf efdudf fdeudf dfeudf edfudf defudf dffedu fdfedu dffedu fdfedu ffdedu ffdedu dfefdu fdefdu deffdu edffdu fedfdu efdfdu dfefdu fdefdu deffdu edffdu fedfdu efdfdu ffeddu ffeddu fefddu effddu fefddu effddu dffdeu fdfdeu dffdeu fdfdeu ffddeu ffddeu dfdfeu fddfeu ddffeu ddffeu fddfeu dfdfeu dfdfeu fddfeu ddffeu ddffeu fddfeu dfdfeu ffddeu ffddeu fdfdeu dffdeu fdfdeu dffdeu dfedfu fdedfu defdfu edfdfu feddfu efddfu dfdefu fddefu ddfefu ddfefu fddefu dfdefu dedffu eddffu ddeffu ddeffu eddffu dedffu feddfu efddfu fdedfu dfedfu edfdfu defdfu dfedfu fdedfu defdfu edfdfu feddfu efddfu dfdefu fddefu ddfefu ddfefu fddefu dfdefu dedffu eddffu ddeffu ddeffu eddffu dedffu feddfu efddfu fdedfu dfedfu edfdfu defdfu ffeddu ffeddu fefddu effddu fefddu effddu ffdedu ffdedu fdfedu dffedu fdfedu dffedu fedfdu efdfdu fdefdu dfefdu edffdu deffdu fedfdu efdfdu fdefdu dfefdu edffdu deffdu uffedd fufedd uffedd fufedd ffuedd ffuedd ufefdd fuefdd ueffdd euffdd feufdd efufdd ufefdd fuefdd ueffdd euffdd feufdd efufdd ffeudd ffeudd fefudd effudd fefudd effudd uffded fufded uffded fufded ffuded ffuded ufdfed fudfed udffed duffed fdufed dfufed ufdfed fudfed udffed duffed fdufed dfufed ffdued ffdued fdfued dffued fdfued dffued ufedfd fuedfd uefdfd eufdfd feudfd efudfd ufdefd fudefd udfefd dufefd fduefd dfuefd uedffd eudffd udeffd dueffd eduffd deuffd fedufd efdufd fdeufd dfeufd edfufd defufd ufedfd fuedfd uefdfd eufdfd feudfd efudfd ufdefd fudefd udfefd dufefd fduefd dfuefd uedffd eudffd udeffd dueffd eduffd deuffd fedufd efdufd fdeufd dfeufd edfufd defufd ffedud ffedud fefdud effdud fefdud effdud ffdeud ffdeud fdfeud dffeud fdfeud dffeud fedfud efdfud fdefud dfefud edffud deffud fedfud efdfud fdefud dfefud edffud deffud
Note: these 'words' (valid or invalid) are all the permutations of the word duffed. These words are obtained by scrambling the letters in duffed.