debus edbus dbeus bdeus ebdus bedus deubs edubs duebs udebs eudbs uedbs dbues bdues dubes udbes budes ubdes ebuds beuds eubds uebds bueds ubeds debsu edbsu dbesu bdesu ebdsu bedsu desbu edsbu dsebu sdebu esdbu sedbu dbseu bdseu dsbeu sdbeu bsdeu sbdeu ebsdu besdu esbdu sebdu bsedu sbedu deusb edusb duesb udesb eudsb uedsb desub edsub dseub sdeub esdub sedub duseb udseb dsueb sdueb usdeb sudeb eusdb uesdb esudb seudb usedb suedb dbuse bduse dubse udbse budse ubdse dbsue bdsue dsbue sdbue bsdue sbdue dusbe udsbe dsube sdube usdbe sudbe busde ubsde bsude sbude usbde subde ebusd beusd eubsd uebsd buesd ubesd ebsud besud esbud sebud bseud sbeud eusbd uesbd esubd seubd usebd suebd bused ubsed bsued sbued usbed subed
Note: these 'words' (valid or invalid) are all the permutations of the word debus. These words are obtained by scrambling the letters in debus.