muzak umzak mzuak zmuak uzmak zumak muazk umazk mauzk amuzk uamzk aumzk mzauk zmauk mazuk amzuk zamuk azmuk uzamk zuamk uazmk auzmk zaumk azumk muzka umzka mzuka zmuka uzmka zumka mukza umkza mkuza kmuza ukmza kumza mzkua zmkua mkzua kmzua zkmua kzmua uzkma zukma ukzma kuzma zkuma kzuma muakz umakz maukz amukz uamkz aumkz mukaz umkaz mkuaz kmuaz ukmaz kumaz makuz amkuz mkauz kmauz akmuz kamuz uakmz aukmz ukamz kuamz akumz kaumz mzaku zmaku mazku amzku zamku azmku mzkau zmkau mkzau kmzau zkmau kzmau makzu amkzu mkazu kmazu akmzu kamzu zakmu azkmu zkamu kzamu akzmu kazmu uzakm zuakm uazkm auzkm zaukm azukm uzkam zukam ukzam kuzam zkuam kzuam uakzm aukzm ukazm kuazm akuzm kauzm zakum azkum zkaum kzaum akzum kazum
Note: these 'words' (valid or invalid) are all the permutations of the word muzak. These words are obtained by scrambling the letters in muzak.