crows rcows corws ocrws rocws orcws crwos rcwos cwros wcros rwcos wrcos cowrs ocwrs cwors wcors owcrs wocrs rowcs orwcs rwocs wrocs owrcs worcs crosw rcosw corsw ocrsw rocsw orcsw crsow rcsow csrow scrow rscow srcow cosrw ocsrw csorw scorw oscrw socrw roscw orscw rsocw srocw osrcw sorcw crwso rcwso cwrso wcrso rwcso wrcso crswo rcswo csrwo scrwo rscwo srcwo cwsro wcsro cswro scwro wscro swcro rwsco wrsco rswco srwco wsrco swrco cowsr ocwsr cwosr wcosr owcsr wocsr coswr ocswr csowr scowr oscwr socwr cwsor wcsor cswor scwor wscor swcor owscr woscr oswcr sowcr wsocr swocr rowsc orwsc rwosc wrosc owrsc worsc roswc orswc rsowc srowc osrwc sorwc rwsoc wrsoc rswoc srwoc wsroc swroc owsrc wosrc oswrc sowrc wsorc sworc
Note: these 'words' (valid or invalid) are all the permutations of the word crows. These words are obtained by scrambling the letters in crows.