dawds adwds dwads wdads awdds wadds dadws addws ddaws ddaws addws dadws dwdas wddas ddwas ddwas wddas dwdas awdds wadds adwds dawds wdads dwads dawsd adwsd dwasd wdasd awdsd wadsd daswd adswd dsawd sdawd asdwd sadwd dwsad wdsad dswad sdwad wsdad swdad awsdd wasdd aswdd sawdd wsadd swadd dadsw addsw ddasw ddasw addsw dadsw dasdw adsdw dsadw sdadw asddw saddw ddsaw ddsaw dsdaw sddaw dsdaw sddaw adsdw dasdw asddw saddw dsadw sdadw dwdsa wddsa ddwsa ddwsa wddsa dwdsa dwsda wdsda dswda sdwda wsdda swdda ddswa ddswa dsdwa sddwa dsdwa sddwa wdsda dwsda wsdda swdda dswda sdwda awdsd wadsd adwsd dawsd wdasd dwasd awsdd wasdd aswdd sawdd wsadd swadd adswd daswd asdwd sadwd dsawd sdawd wdsad dwsad wsdad swdad dswad sdwad
Note: these 'words' (valid or invalid) are all the permutations of the word dawds. These words are obtained by scrambling the letters in dawds.