debug edbug dbeug bdeug ebdug bedug deubg edubg duebg udebg eudbg uedbg dbueg bdueg dubeg udbeg budeg ubdeg ebudg beudg eubdg uebdg buedg ubedg debgu edbgu dbegu bdegu ebdgu bedgu degbu edgbu dgebu gdebu egdbu gedbu dbgeu bdgeu dgbeu gdbeu bgdeu gbdeu ebgdu begdu egbdu gebdu bgedu gbedu deugb edugb duegb udegb eudgb uedgb degub edgub dgeub gdeub egdub gedub dugeb udgeb dgueb gdueb ugdeb gudeb eugdb uegdb egudb geudb ugedb guedb dbuge bduge dubge udbge budge ubdge dbgue bdgue dgbue gdbue bgdue gbdue dugbe udgbe dgube gdube ugdbe gudbe bugde ubgde bgude gbude ugbde gubde ebugd beugd eubgd uebgd buegd ubegd ebgud begud egbud gebud bgeud gbeud eugbd uegbd egubd geubd ugebd guebd buged ubged bgued gbued ugbed gubed
Note: these 'words' (valid or invalid) are all the permutations of the word debug. These words are obtained by scrambling the letters in debug.