ibdry bidry idbry dibry bdiry dbiry ibrdy birdy irbdy ribdy bridy rbidy idrby dirby irdby ridby driby rdiby bdriy dbriy brdiy rbdiy drbiy rdbiy ibdyr bidyr idbyr dibyr bdiyr dbiyr ibydr biydr iybdr yibdr byidr ybidr idybr diybr iydbr yidbr dyibr ydibr bdyir dbyir bydir ybdir dybir ydbir ibryd biryd irbyd ribyd briyd rbiyd ibyrd biyrd iybrd yibrd byird ybird irybd riybd iyrbd yirbd ryibd yribd bryid rbyid byrid ybrid rybid yrbid idryb diryb irdyb ridyb driyb rdiyb idyrb diyrb iydrb yidrb dyirb ydirb irydb riydb iyrdb yirdb ryidb yridb dryib rdyib dyrib ydrib rydib yrdib bdryi dbryi brdyi rbdyi drbyi rdbyi bdyri dbyri bydri ybdri dybri ydbri brydi rbydi byrdi ybrdi rybdi yrbdi drybi rdybi dyrbi ydrbi rydbi yrdbi
Note: these 'words' (valid or invalid) are all the permutations of the word ibdry. These words are obtained by scrambling the letters in ibdry.