snebs nsebs senbs esnbs nesbs ensbs snbes nsbes sbnes bsnes nbses bnses sebns esbns sbens bsens ebsns besns nebss enbss nbess bness ebnss benss snesb nsesb sensb esnsb nessb enssb snseb nsseb ssneb ssneb nsseb snseb sesnb essnb ssenb ssenb essnb sesnb nessb enssb nsesb snesb esnsb sensb snbse nsbse sbnse bsnse nbsse bnsse snsbe nssbe ssnbe ssnbe nssbe snsbe sbsne bssne ssbne ssbne bssne sbsne nbsse bnsse nsbse snbse bsnse sbnse sebsn esbsn sbesn bsesn ebssn bessn sesbn essbn ssebn ssebn essbn sesbn sbsen bssen ssben ssben bssen sbsen ebssn bessn esbsn sebsn bsesn sbesn nebss enbss nbess bness ebnss benss nesbs ensbs nsebs snebs esnbs senbs nbses bnses nsbes snbes bsnes sbnes ebsns besns esbns sebns bsens sbens
Note: these 'words' (valid or invalid) are all the permutations of the word snebs. These words are obtained by scrambling the letters in snebs.