aband baand aabnd aabnd baand aband abnad banad anbad nabad bnaad nbaad aanbd aanbd anabd naabd anabd naabd banad abnad bnaad nbaad anbad nabad abadn baadn aabdn aabdn baadn abadn abdan badan adban daban bdaan dbaan aadbn aadbn adabn daabn adabn daabn badan abdan bdaan dbaan adban daban abnda banda anbda nabda bnada nbada abdna badna adbna dabna bdana dbana andba nadba adnba danba ndaba dnaba bndaa nbdaa bdnaa dbnaa ndbaa dnbaa aandb aandb anadb naadb anadb naadb aadnb aadnb adanb daanb adanb daanb andab nadab adnab danab ndaab dnaab andab nadab adnab danab ndaab dnaab banda abnda bnada nbada anbda nabda badna abdna bdana dbana adbna dabna bndaa nbdaa bdnaa dbnaa ndbaa dnbaa andba nadba adnba danba ndaba dnaba
Note: these 'words' (valid or invalid) are all the permutations of the word aband. These words are obtained by scrambling the letters in aband.