nbsba bnsba nsbba snbba bsnba sbnba nbbsa bnbsa nbbsa bnbsa bbnsa bbnsa nsbba snbba nbsba bnsba sbnba bsnba bsbna sbbna bbsna bbsna sbbna bsbna nbsab bnsab nsbab snbab bsnab sbnab nbasb bnasb nabsb anbsb bansb abnsb nsabb snabb nasbb ansbb sanbb asnbb bsanb sbanb basnb absnb sabnb asbnb nbbas bnbas nbbas bnbas bbnas bbnas nbabs bnabs nabbs anbbs banbs abnbs nbabs bnabs nabbs anbbs banbs abnbs bbans bbans babns abbns babns abbns nsbab snbab nbsab bnsab sbnab bsnab nsabb snabb nasbb ansbb sanbb asnbb nbasb bnasb nabsb anbsb bansb abnsb sbanb bsanb sabnb asbnb basnb absnb bsban sbban bbsan bbsan sbban bsban bsabn sbabn basbn absbn sabbn asbbn bbasn bbasn babsn abbsn babsn abbsn sbabn bsabn sabbn asbbn basbn absbn
Note: these 'words' (valid or invalid) are all the permutations of the word nbsba. These words are obtained by scrambling the letters in nbsba.