unbag nubag ubnag bunag nbuag bnuag unabg nuabg uanbg aunbg naubg anubg ubang buang uabng aubng baung abung nbaug bnaug nabug anbug banug abnug unbga nubga ubnga bunga nbuga bnuga ungba nugba ugnba gunba nguba gnuba ubgna bugna ugbna gubna bguna gbuna nbgua bngua ngbua gnbua bgnua gbnua unagb nuagb uangb aungb naugb anugb ungab nugab ugnab gunab nguab gnuab uagnb augnb uganb guanb agunb gaunb nagub angub ngaub gnaub agnub ganub ubagn buagn uabgn aubgn baugn abugn ubgan bugan ugban guban bguan gbuan uagbn augbn ugabn guabn agubn gaubn bagun abgun bgaun gbaun agbun gabun nbagu bnagu nabgu anbgu bangu abngu nbgau bngau ngbau gnbau bgnau gbnau nagbu angbu ngabu gnabu agnbu ganbu bagnu abgnu bganu gbanu agbnu gabnu
Note: these 'words' (valid or invalid) are all the permutations of the word unbag. These words are obtained by scrambling the letters in unbag.