beisd ebisd biesd ibesd eibsd iebsd besid ebsid bseid sbeid esbid sebid bised ibsed bsied sbied isbed sibed eisbd iesbd esibd seibd isebd siebd beids ebids bieds ibeds eibds iebds bedis ebdis bdeis dbeis edbis debis bides ibdes bdies dbies idbes dibes eidbs iedbs edibs deibs idebs diebs besdi ebsdi bsedi sbedi esbdi sebdi bedsi ebdsi bdesi dbesi edbsi debsi bsdei sbdei bdsei dbsei sdbei dsbei esdbi sedbi edsbi desbi sdebi dsebi bisde ibsde bside sbide isbde sibde bidse ibdse bdise dbise idbse dibse bsdie sbdie bdsie dbsie sdbie dsbie isdbe sidbe idsbe disbe sdibe dsibe eisdb iesdb esidb seidb isedb siedb eidsb iedsb edisb deisb idesb diesb esdib sedib edsib desib sdeib dseib isdeb sideb idseb diseb sdieb dsieb
Note: these 'words' (valid or invalid) are all the permutations of the word beisd. These words are obtained by scrambling the letters in beisd.