duply udply dpuly pduly updly pudly dulpy udlpy dlupy ldupy uldpy ludpy dpluy pdluy dlpuy ldpuy plduy lpduy upldy puldy ulpdy lupdy pludy lpudy dupyl udpyl dpuyl pduyl updyl pudyl duypl udypl dyupl ydupl uydpl yudpl dpyul pdyul dypul ydpul pydul ypdul upydl puydl uypdl yupdl pyudl ypudl dulyp udlyp dluyp lduyp uldyp ludyp duylp udylp dyulp ydulp uydlp yudlp dlyup ldyup dylup ydlup lydup yldup ulydp luydp uyldp yuldp lyudp yludp dplyu pdlyu dlpyu ldpyu pldyu lpdyu dpylu pdylu dyplu ydplu pydlu ypdlu dlypu ldypu dylpu ydlpu lydpu yldpu plydu lpydu pyldu ypldu lypdu ylpdu uplyd pulyd ulpyd lupyd pluyd lpuyd upyld puyld uypld yupld pyuld ypuld ulypd luypd uylpd yulpd lyupd ylupd plyud lpyud pylud yplud lypud ylpud
Note: these 'words' (valid or invalid) are all the permutations of the word duply. These words are obtained by scrambling the letters in duply.