ambnk mabnk abmnk bamnk mbank bmank amnbk manbk anmbk nambk mnabk nmabk abnmk banmk anbmk nabmk bnamk nbamk mbnak bmnak mnbak nmbak bnmak nbmak ambkn mabkn abmkn bamkn mbakn bmakn amkbn makbn akmbn kambn mkabn kmabn abkmn bakmn akbmn kabmn bkamn kbamn mbkan bmkan mkban kmban bkman kbman amnkb mankb anmkb namkb mnakb nmakb amknb maknb akmnb kamnb mkanb kmanb ankmb nakmb aknmb kanmb nkamb knamb mnkab nmkab mknab kmnab nkmab knmab abnkm bankm anbkm nabkm bnakm nbakm abknm baknm akbnm kabnm bkanm kbanm ankbm nakbm aknbm kanbm nkabm knabm bnkam nbkam bknam kbnam nkbam knbam mbnka bmnka mnbka nmbka bnmka nbmka mbkna bmkna mkbna kmbna bkmna kbmna mnkba nmkba mknba kmnba nkmba knmba bnkma nbkma bknma kbnma nkbma knbma
Note: these 'words' (valid or invalid) are all the permutations of the word ambnk. These words are obtained by scrambling the letters in ambnk.