mumps ummps mmups mmups ummps mumps mupms umpms mpums pmums upmms pumms mmpus mmpus mpmus pmmus mpmus pmmus umpms mupms upmms pumms mpums pmums mumsp ummsp mmusp mmusp ummsp mumsp musmp umsmp msump smump usmmp summp mmsup mmsup msmup smmup msmup smmup umsmp musmp usmmp summp msump smump mupsm umpsm mpusm pmusm upmsm pumsm muspm umspm msupm smupm usmpm sumpm mpsum pmsum mspum smpum psmum spmum upsmm pusmm uspmm supmm psumm spumm mmpsu mmpsu mpmsu pmmsu mpmsu pmmsu mmspu mmspu msmpu smmpu msmpu smmpu mpsmu pmsmu mspmu smpmu psmmu spmmu mpsmu pmsmu mspmu smpmu psmmu spmmu umpsm mupsm upmsm pumsm mpusm pmusm umspm muspm usmpm sumpm msupm smupm upsmm pusmm uspmm supmm psumm spumm mpsum pmsum mspum smpum psmum spmum
Note: these 'words' (valid or invalid) are all the permutations of the word mumps. These words are obtained by scrambling the letters in mumps.