bigv ibgv bgiv gbiv igbv gibv bivg ibvg bvig vbig ivbg vibg bgvi gbvi bvgi vbgi gvbi vgbi igvb givb ivgb vigb gvib vgib
Note: these 'words' (valid or invalid) are all the permutations of the word bigv. These words are obtained by scrambling the letters in bigv.