congo ocngo cnogo ncogo oncgo nocgo cogno ocgno cgono gcono ogcno gocno cngoo ncgoo cgnoo gcnoo ngcoo gncoo ongco nogco ognco gonco ngoco gnoco conog ocnog cnoog ncoog oncog nocog coong ocong coong ocong oocng oocng cnoog ncoog conog ocnog nocog oncog onocg noocg ooncg ooncg noocg onocg cogon ocgon cgoon gcoon ogcon gocon coogn ocogn coogn ocogn oocgn oocgn cgoon gcoon cogon ocgon gocon ogcon ogocn goocn oogcn oogcn goocn ogocn cngoo ncgoo cgnoo gcnoo ngcoo gncoo cnogo ncogo congo ocngo nocgo oncgo cgono gcono cogno ocgno gocno ogcno ngoco gnoco nogco ongco gonco ognco ongoc nogoc ognoc gonoc ngooc gnooc onogc noogc oongc oongc noogc onogc ogonc goonc oognc oognc goonc ogonc ngooc gnooc nogoc ongoc gonoc ognoc
Note: these 'words' (valid or invalid) are all the permutations of the word congo. These words are obtained by scrambling the letters in congo.