mpron pmron mrpon rmpon prmon rpmon mporn pmorn moprn omprn pomrn opmrn mropn rmopn morpn omrpn rompn ormpn promn rpomn pormn oprmn ropmn orpmn mprno pmrno mrpno rmpno prmno rpmno mpnro pmnro mnpro nmpro pnmro npmro mrnpo rmnpo mnrpo nmrpo rnmpo nrmpo prnmo rpnmo pnrmo nprmo rnpmo nrpmo mponr pmonr mopnr ompnr pomnr opmnr mpnor pmnor mnpor nmpor pnmor npmor monpr omnpr mnopr nmopr onmpr nompr ponmr opnmr pnomr npomr onpmr nopmr mronp rmonp mornp omrnp romnp ormnp mrnop rmnop mnrop nmrop rnmop nrmop monrp omnrp mnorp nmorp onmrp nomrp ronmp ornmp rnomp nromp onrmp normp pronm rponm pornm oprnm ropnm orpnm prnom rpnom pnrom nprom rnpom nrpom ponrm opnrm pnorm nporm onprm noprm ronpm ornpm rnopm nropm onrpm norpm
Note: these 'words' (valid or invalid) are all the permutations of the word mpron. These words are obtained by scrambling the letters in mpron.