bisks ibsks bsiks sbiks isbks sibks bikss ibkss bkiss kbiss ikbss kibss bskis sbkis bksis kbsis skbis ksbis iskbs sikbs iksbs kisbs skibs ksibs bissk ibssk bsisk sbisk isbsk sibsk bissk ibssk bsisk sbisk isbsk sibsk bssik sbsik bssik sbsik ssbik ssbik issbk sisbk issbk sisbk ssibk ssibk bikss ibkss bkiss kbiss ikbss kibss bisks ibsks bsiks sbiks isbks sibks bksis kbsis bskis sbkis ksbis skbis iksbs kisbs iskbs sikbs ksibs skibs bsksi sbksi bkssi kbssi skbsi ksbsi bsski sbski bsski sbski ssbki ssbki bkssi kbssi bsksi sbksi ksbsi skbsi sksbi kssbi sskbi sskbi kssbi sksbi isksb siksb ikssb kissb skisb ksisb isskb siskb isskb siskb ssikb ssikb ikssb kissb isksb siksb ksisb skisb sksib kssib sskib sskib kssib sksib
Note: these 'words' (valid or invalid) are all the permutations of the word bisks. These words are obtained by scrambling the letters in bisks.