bison ibson bsion sbion isbon sibon biosn ibosn boisn obisn iobsn oibsn bsoin sboin bosin obsin sobin osbin isobn siobn iosbn oisbn soibn osibn bisno ibsno bsino sbino isbno sibno binso ibnso bniso nbiso inbso nibso bsnio sbnio bnsio nbsio snbio nsbio isnbo sinbo insbo nisbo snibo nsibo bions ibons boins obins iobns oibns binos ibnos bnios nbios inbos nibos bonis obnis bnois nbois onbis nobis ionbs oinbs inobs niobs onibs noibs bsoni sboni bosni obsni sobni osbni bsnoi sbnoi bnsoi nbsoi snboi nsboi bonsi obnsi bnosi nbosi onbsi nobsi sonbi osnbi snobi nsobi onsbi nosbi isonb sionb iosnb oisnb soinb osinb isnob sinob insob nisob sniob nsiob ionsb oinsb inosb niosb onisb noisb sonib osnib snoib nsoib onsib nosib
Note: these 'words' (valid or invalid) are all the permutations of the word bison. These words are obtained by scrambling the letters in bison.