birsy ibrsy brisy rbisy irbsy ribsy bisry ibsry bsiry sbiry isbry sibry brsiy rbsiy bsriy sbriy rsbiy srbiy irsby risby isrby sirby rsiby sriby birys ibrys briys rbiys irbys ribys biyrs ibyrs byirs ybirs iybrs yibrs bryis rbyis byris ybris rybis yrbis irybs riybs iyrbs yirbs ryibs yribs bisyr ibsyr bsiyr sbiyr isbyr sibyr biysr ibysr byisr ybisr iybsr yibsr bsyir sbyir bysir ybsir sybir ysbir isybr siybr iysbr yisbr syibr ysibr brsyi rbsyi bsryi sbryi rsbyi srbyi brysi rbysi byrsi ybrsi rybsi yrbsi bsyri sbyri bysri ybsri sybri ysbri rsybi srybi rysbi yrsbi syrbi ysrbi irsyb risyb isryb siryb rsiyb sriyb irysb riysb iyrsb yirsb ryisb yrisb isyrb siyrb iysrb yisrb syirb ysirb rsyib sryib rysib yrsib syrib ysrib
Note: these 'words' (valid or invalid) are all the permutations of the word birsy. These words are obtained by scrambling the letters in birsy.