rswal srwal rwsal wrsal swral wsral rsawl srawl raswl arswl sarwl asrwl rwasl wrasl rawsl arwsl warsl awrsl swarl wsarl sawrl aswrl wasrl awsrl rswla srwla rwsla wrsla swrla wsrla rslwa srlwa rlswa lrswa slrwa lsrwa rwlsa wrlsa rlwsa lrwsa wlrsa lwrsa swlra wslra slwra lswra wlsra lwsra rsalw sralw raslw arslw sarlw asrlw rslaw srlaw rlsaw lrsaw slraw lsraw ralsw arlsw rlasw lrasw alrsw larsw salrw aslrw slarw lsarw alsrw lasrw rwals wrals rawls arwls warls awrls rwlas wrlas rlwas lrwas wlras lwras ralws arlws rlaws lraws alrws larws walrs awlrs wlars lwars alwrs lawrs swalr wsalr sawlr aswlr waslr awslr swlar wslar slwar lswar wlsar lwsar salwr aslwr slawr lsawr alswr laswr walsr awlsr wlasr lwasr alwsr lawsr
Note: these 'words' (valid or invalid) are all the permutations of the word rswal. These words are obtained by scrambling the letters in rswal.