banks abnks bnaks nbaks anbks nabks bakns abkns bkans kbans akbns kabns bnkas nbkas bknas kbnas nkbas knbas ankbs nakbs aknbs kanbs nkabs knabs bansk abnsk bnask nbask anbsk nabsk basnk absnk bsank sbank asbnk sabnk bnsak nbsak bsnak sbnak nsbak snbak ansbk nasbk asnbk sanbk nsabk snabk baksn abksn bkasn kbasn akbsn kabsn baskn abskn bsakn sbakn asbkn sabkn bksan kbsan bskan sbkan ksban skban aksbn kasbn askbn sakbn ksabn skabn bnksa nbksa bknsa kbnsa nkbsa knbsa bnska nbska bsnka sbnka nsbka snbka bksna kbsna bskna sbkna ksbna skbna nksba knsba nskba snkba ksnba sknba anksb naksb aknsb kansb nkasb knasb anskb naskb asnkb sankb nsakb snakb aksnb kasnb asknb saknb ksanb skanb nksab knsab nskab snkab ksnab sknab
Note: these 'words' (valid or invalid) are all the permutations of the word banks. These words are obtained by scrambling the letters in banks.