mudir umdir mduir dmuir udmir dumir muidr umidr miudr imudr uimdr iumdr mdiur dmiur midur imdur dimur idmur udimr duimr uidmr iudmr diumr idumr mudri umdri mduri dmuri udmri dumri murdi umrdi mrudi rmudi urmdi rumdi mdrui dmrui mrdui rmdui drmui rdmui udrmi durmi urdmi rudmi drumi rdumi muird umird miurd imurd uimrd iumrd murid umrid mruid rmuid urmid rumid mirud imrud mriud rmiud irmud rimud uirmd iurmd urimd ruimd irumd riumd mdiru dmiru midru imdru dimru idmru mdriu dmriu mrdiu rmdiu drmiu rdmiu mirdu imrdu mridu rmidu irmdu rimdu dirmu idrmu drimu rdimu irdmu ridmu udirm duirm uidrm iudrm diurm idurm udrim durim urdim rudim druim rduim uirdm iurdm uridm ruidm irudm riudm dirum idrum drium rdium irdum ridum
Note: these 'words' (valid or invalid) are all the permutations of the word mudir. These words are obtained by scrambling the letters in mudir.