bises ibses bsies sbies isbes sibes biess ibess beiss ebiss iebss eibss bseis sbeis besis ebsis sebis esbis isebs siebs iesbs eisbs seibs esibs bisse ibsse bsise sbise isbse sibse bisse ibsse bsise sbise isbse sibse bssie sbsie bssie sbsie ssbie ssbie issbe sisbe issbe sisbe ssibe ssibe biess ibess beiss ebiss iebss eibss bises ibses bsies sbies isbes sibes besis ebsis bseis sbeis esbis sebis iesbs eisbs isebs siebs esibs seibs bsesi sbesi bessi ebssi sebsi esbsi bssei sbsei bssei sbsei ssbei ssbei bessi ebssi bsesi sbesi esbsi sebsi sesbi essbi ssebi ssebi essbi sesbi isesb siesb iessb eissb seisb esisb isseb siseb isseb siseb ssieb ssieb iessb eissb isesb siesb esisb seisb sesib essib sseib sseib essib sesib
Note: these 'words' (valid or invalid) are all the permutations of the word bises. These words are obtained by scrambling the letters in bises.