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