sybbe ysbbe sbybe bsybe ybsbe bysbe sybbe ysbbe sbybe bsybe ybsbe bysbe sbbye bsbye sbbye bsbye bbsye bbsye ybbse bybse ybbse bybse bbyse bbyse sybeb ysbeb sbyeb bsyeb ybseb byseb syebb ysebb seybb esybb yesbb eysbb sbeyb bseyb sebyb esbyb besyb ebsyb ybesb byesb yebsb eybsb beysb ebysb sybeb ysbeb sbyeb bsyeb ybseb byseb syebb ysebb seybb esybb yesbb eysbb sbeyb bseyb sebyb esbyb besyb ebsyb ybesb byesb yebsb eybsb beysb ebysb sbbey bsbey sbbey bsbey bbsey bbsey sbeby bseby sebby esbby besby ebsby sbeby bseby sebby esbby besby ebsby bbesy bbesy bebsy ebbsy bebsy ebbsy ybbes bybes ybbes bybes bbyes bbyes ybebs byebs yebbs eybbs beybs ebybs ybebs byebs yebbs eybbs beybs ebybs bbeys bbeys bebys ebbys bebys ebbys
Note: these 'words' (valid or invalid) are all the permutations of the word sybbe. These words are obtained by scrambling the letters in sybbe.