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