mulls umlls mluls lmuls ulmls lumls mulls umlls mluls lmuls ulmls lumls mllus lmlus mllus lmlus llmus llmus ullms lulms ullms lulms llums llums mulsl umlsl mlusl lmusl ulmsl lumsl musll umsll msull smull usmll sumll mlsul lmsul mslul smlul lsmul slmul ulsml lusml uslml sulml lsuml sluml mulsl umlsl mlusl lmusl ulmsl lumsl musll umsll msull smull usmll sumll mlsul lmsul mslul smlul lsmul slmul ulsml lusml uslml sulml lsuml sluml mllsu lmlsu mllsu lmlsu llmsu llmsu mlslu lmslu msllu smllu lsmlu slmlu mlslu lmslu msllu smllu lsmlu slmlu llsmu llsmu lslmu sllmu lslmu sllmu ullsm lulsm ullsm lulsm llusm llusm ulslm luslm usllm sullm lsulm slulm ulslm luslm usllm sullm lsulm slulm llsum llsum lslum sllum lslum sllum
Note: these 'words' (valid or invalid) are all the permutations of the word mulls. These words are obtained by scrambling the letters in mulls.