mopus ompus mpous pmous opmus pomus moups omups muops umops oumps uomps mpuos pmuos mupos umpos pumos upmos opums poums oupms uopms puoms upoms mopsu ompsu mposu pmosu opmsu pomsu mospu omspu msopu smopu osmpu sompu mpsou pmsou mspou smpou psmou spmou opsmu posmu ospmu sopmu psomu spomu mousp omusp muosp umosp oumsp uomsp mosup omsup msoup smoup osmup somup musop umsop msuop smuop usmop sumop ousmp uosmp osump soump usomp suomp mpuso pmuso mupso umpso pumso upmso mpsuo pmsuo mspuo smpuo psmuo spmuo muspo umspo msupo smupo usmpo sumpo pusmo upsmo psumo spumo uspmo supmo opusm pousm oupsm uopsm puosm uposm opsum posum ospum sopum psoum spoum ouspm uospm osupm soupm usopm suopm pusom upsom psuom spuom uspom supom
Note: these 'words' (valid or invalid) are all the permutations of the word mopus. These words are obtained by scrambling the letters in mopus.