mrith rmith mirth imrth rimth irmth mrtih rmtih mtrih tmrih rtmih trmih mitrh imtrh mtirh tmirh itmrh timrh ritmh irtmh rtimh trimh itrmh tirmh mriht rmiht mirht imrht rimht irmht mrhit rmhit mhrit hmrit rhmit hrmit mihrt imhrt mhirt hmirt ihmrt himrt rihmt irhmt rhimt hrimt ihrmt hirmt mrthi rmthi mtrhi tmrhi rtmhi trmhi mrhti rmhti mhrti hmrti rhmti hrmti mthri tmhri mhtri hmtri thmri htmri rthmi trhmi rhtmi hrtmi thrmi htrmi mithr imthr mtihr tmihr itmhr timhr mihtr imhtr mhitr hmitr ihmtr himtr mthir tmhir mhtir hmtir thmir htmir ithmr tihmr ihtmr hitmr thimr htimr rithm irthm rtihm trihm itrhm tirhm rihtm irhtm rhitm hritm ihrtm hirtm rthim trhim rhtim hrtim thrim htrim ithrm tihrm ihtrm hitrm thirm htirm
Note: these 'words' (valid or invalid) are all the permutations of the word mrith. These words are obtained by scrambling the letters in mrith.