mcucs cmucs muccs umccs cumcs ucmcs mccus cmcus mccus cmcus ccmus ccmus muccs umccs mcucs cmucs ucmcs cumcs cucms uccms ccums ccums uccms cucms mcusc cmusc mucsc umcsc cumsc ucmsc mcsuc cmsuc mscuc smcuc csmuc scmuc muscc umscc msucc smucc usmcc sumcc cusmc ucsmc csumc scumc uscmc sucmc mccsu cmcsu mccsu cmcsu ccmsu ccmsu mcscu cmscu msccu smccu csmcu scmcu mcscu cmscu msccu smccu csmcu scmcu ccsmu ccsmu cscmu sccmu cscmu sccmu mucsc umcsc mcusc cmusc ucmsc cumsc muscc umscc msucc smucc usmcc sumcc mcsuc cmsuc mscuc smcuc csmuc scmuc ucsmc cusmc uscmc sucmc csumc scumc cucsm uccsm ccusm ccusm uccsm cucsm cuscm ucscm csucm scucm usccm succm ccsum ccsum cscum sccum cscum sccum ucscm cuscm usccm succm csucm scucm
Note: these 'words' (valid or invalid) are all the permutations of the word mcucs. These words are obtained by scrambling the letters in mcucs.