cpumc pcumc cupmc ucpmc pucmc upcmc cpmuc pcmuc cmpuc mcpuc pmcuc mpcuc cumpc ucmpc cmupc mcupc umcpc mucpc pumcc upmcc pmucc mpucc umpcc mupcc cpucm pcucm cupcm ucpcm puccm upccm cpcum pccum ccpum ccpum pccum cpcum cucpm uccpm ccupm ccupm uccpm cucpm puccm upccm pcucm cpucm ucpcm cupcm cpmcu pcmcu cmpcu mcpcu pmccu mpccu cpcmu pccmu ccpmu ccpmu pccmu cpcmu cmcpu mccpu ccmpu ccmpu mccpu cmcpu pmccu mpccu pcmcu cpmcu mcpcu cmpcu cumcp ucmcp cmucp mcucp umccp muccp cucmp uccmp ccump ccump uccmp cucmp cmcup mccup ccmup ccmup mccup cmcup umccp muccp ucmcp cumcp mcucp cmucp pumcc upmcc pmucc mpucc umpcc mupcc pucmc upcmc pcumc cpumc ucpmc cupmc pmcuc mpcuc pcmuc cpmuc mcpuc cmpuc umcpc mucpc ucmpc cumpc mcupc cmupc
Note: these 'words' (valid or invalid) are all the permutations of the word cpumc. These words are obtained by scrambling the letters in cpumc.