knubs nkubs kunbs uknbs nukbs unkbs knbus nkbus kbnus bknus nbkus bnkus kubns ukbns kbuns bkuns ubkns bukns nubks unbks nbuks bnuks ubnks bunks knusb nkusb kunsb uknsb nuksb unksb knsub nksub ksnub sknub nskub snkub kusnb uksnb ksunb skunb usknb suknb nuskb unskb nsukb snukb usnkb sunkb knbsu nkbsu kbnsu bknsu nbksu bnksu knsbu nksbu ksnbu sknbu nskbu snkbu kbsnu bksnu ksbnu skbnu bsknu sbknu nbsku bnsku nsbku snbku bsnku sbnku kubsn ukbsn kbusn bkusn ubksn buksn kusbn uksbn ksubn skubn uskbn sukbn kbsun bksun ksbun skbun bskun sbkun ubskn buskn usbkn subkn bsukn sbukn nubsk unbsk nbusk bnusk ubnsk bunsk nusbk unsbk nsubk snubk usnbk sunbk nbsuk bnsuk nsbuk snbuk bsnuk sbnuk ubsnk busnk usbnk subnk bsunk sbunk
Note: these 'words' (valid or invalid) are all the permutations of the word knubs. These words are obtained by scrambling the letters in knubs.