perdu eprdu predu rpedu erpdu repdu pedru epdru pderu dperu edpru depru prdeu rpdeu pdreu dpreu rdpeu drpeu erdpu redpu edrpu derpu rdepu drepu perud eprud preud rpeud erpud repud peurd epurd puerd uperd euprd ueprd prued rpued pured upred ruped urped erupd reupd eurpd uerpd ruepd urepd pedur epdur pdeur dpeur edpur depur peudr epudr puedr upedr eupdr uepdr pduer dpuer puder upder duper udper edupr deupr eudpr uedpr duepr udepr prdue rpdue pdrue dprue rdpue drpue prude rpude purde uprde rupde urpde pdure dpure pudre updre dupre udpre rdupe drupe rudpe urdpe durpe udrpe erdup redup edrup derup rdeup dreup erudp reudp eurdp uerdp ruedp uredp edurp deurp eudrp uedrp duerp uderp rduep druep rudep urdep durep udrep
Note: these 'words' (valid or invalid) are all the permutations of the word perdu. These words are obtained by scrambling the letters in perdu.