prone rpone porne oprne ropne orpne prnoe rpnoe pnroe nproe rnpoe nrpoe ponre opnre pnore npore onpre nopre ronpe ornpe rnope nrope onrpe norpe proen rpoen poren opren ropen orpen preon rpeon peron epron repon erpon poern opern peorn eporn oeprn eoprn roepn orepn reopn eropn oerpn eorpn prneo rpneo pnreo npreo rnpeo nrpeo preno rpeno perno eprno repno erpno pnero npero penro epnro nepro enpro rnepo nrepo renpo ernpo nerpo enrpo poner opner pnoer npoer onper noper poenr openr peonr eponr oepnr eopnr pneor npeor penor epnor nepor enpor onepr noepr oenpr eonpr neopr enopr ronep ornep rnoep nroep onrep norep roenp orenp reonp eronp oernp eornp rneop nreop renop ernop nerop enrop onerp noerp oenrp eonrp neorp enorp
Note: these 'words' (valid or invalid) are all the permutations of the word prone. These words are obtained by scrambling the letters in prone.