pubes upbes pbues bpues ubpes bupes puebs upebs peubs epubs uepbs eupbs pbeus bpeus pebus epbus bepus ebpus ubeps bueps uebps eubps beups ebups pubse upbse pbuse bpuse ubpse bupse pusbe upsbe psube spube uspbe supbe pbsue bpsue psbue spbue bspue sbpue ubspe buspe usbpe subpe bsupe sbupe puesb upesb peusb epusb uepsb eupsb puseb upseb psueb spueb uspeb supeb pesub epsub pseub speub espub sepub uespb euspb usepb suepb esupb seupb pbesu bpesu pebsu epbsu bepsu ebpsu pbseu bpseu psbeu spbeu bspeu sbpeu pesbu epsbu psebu spebu espbu sepbu bespu ebspu bsepu sbepu esbpu sebpu ubesp buesp uebsp eubsp beusp ebusp ubsep busep usbep subep bsuep sbuep uesbp eusbp usebp suebp esubp seubp besup ebsup bseup sbeup esbup sebup
Note: these 'words' (valid or invalid) are all the permutations of the word pubes. These words are obtained by scrambling the letters in pubes.