ngeab gneab negab engab genab egnab ngaeb gnaeb nageb angeb ganeb agneb neagb enagb naegb anegb eangb aengb geanb eganb gaenb agenb eagnb aegnb ngeba gneba negba engba genba egnba ngbea gnbea nbgea bngea gbnea bgnea nebga enbga nbega bnega ebnga benga gebna egbna gbena bgena ebgna begna ngabe gnabe nagbe angbe ganbe agnbe ngbae gnbae nbgae bngae gbnae bgnae nabge anbge nbage bnage abnge bange gabne agbne gbane bgane abgne bagne neabg enabg naebg anebg eanbg aenbg nebag enbag nbeag bneag ebnag benag nabeg anbeg nbaeg bnaeg abneg baneg eabng aebng ebang beang abeng baeng geabn egabn gaebn agebn eagbn aegbn geban egban gbean bgean ebgan began gaben agben gbaen bgaen abgen bagen eabgn aebgn ebagn beagn abegn baegn
Note: these 'words' (valid or invalid) are all the permutations of the word ngeab. These words are obtained by scrambling the letters in ngeab.