tubal utbal tbual btual ubtal butal tuabl utabl taubl atubl uatbl autbl tbaul btaul tabul atbul batul abtul ubatl buatl uabtl aubtl bautl abutl tubla utbla tbula btula ubtla butla tulba utlba tluba ltuba ultba lutba tblua btlua tlbua ltbua bltua lbtua ublta bulta ulbta lubta bluta lbuta tualb utalb taulb atulb uatlb autlb tulab utlab tluab ltuab ultab lutab talub atlub tlaub ltaub altub latub ualtb aultb ulatb luatb alutb lautb tbalu btalu tablu atblu batlu abtlu tblau btlau tlbau ltbau bltau lbtau talbu atlbu tlabu ltabu altbu latbu baltu abltu blatu lbatu albtu labtu ubalt bualt uablt aublt bault abult ublat bulat ulbat lubat bluat lbuat ualbt aulbt ulabt luabt alubt laubt balut ablut blaut lbaut albut labut
Note: these 'words' (valid or invalid) are all the permutations of the word tubal. These words are obtained by scrambling the letters in tubal.