nalfx anlfx nlafx lnafx alnfx lanfx naflx anflx nfalx fnalx afnlx fanlx nlfax lnfax nflax fnlax lfnax flnax alfnx lafnx aflnx falnx lfanx flanx nalxf anlxf nlaxf lnaxf alnxf lanxf naxlf anxlf nxalf xnalf axnlf xanlf nlxaf lnxaf nxlaf xnlaf lxnaf xlnaf alxnf laxnf axlnf xalnf lxanf xlanf nafxl anfxl nfaxl fnaxl afnxl fanxl naxfl anxfl nxafl xnafl axnfl xanfl nfxal fnxal nxfal xnfal fxnal xfnal afxnl faxnl axfnl xafnl fxanl xfanl nlfxa lnfxa nflxa fnlxa lfnxa flnxa nlxfa lnxfa nxlfa xnlfa lxnfa xlnfa nfxla fnxla nxfla xnfla fxnla xfnla lfxna flxna lxfna xlfna fxlna xflna alfxn lafxn aflxn falxn lfaxn flaxn alxfn laxfn axlfn xalfn lxafn xlafn afxln faxln axfln xafln fxaln xfaln lfxan flxan lxfan xlfan fxlan xflan
Note: these 'words' (valid or invalid) are all the permutations of the word nalfx. These words are obtained by scrambling the letters in nalfx.