dorbs odrbs drobs rdobs ordbs rodbs dobrs odbrs dbors bdors obdrs bodrs drbos rdbos dbros bdros rbdos brdos orbds robds obrds bords rbods brods dorsb odrsb drosb rdosb ordsb rodsb dosrb odsrb dsorb sdorb osdrb sodrb drsob rdsob dsrob sdrob rsdob srdob orsdb rosdb osrdb sordb rsodb srodb dobsr odbsr dbosr bdosr obdsr bodsr dosbr odsbr dsobr sdobr osdbr sodbr dbsor bdsor dsbor sdbor bsdor sbdor obsdr bosdr osbdr sobdr bsodr sbodr drbso rdbso dbrso bdrso rbdso brdso drsbo rdsbo dsrbo sdrbo rsdbo srdbo dbsro bdsro dsbro sdbro bsdro sbdro rbsdo brsdo rsbdo srbdo bsrdo sbrdo orbsd robsd obrsd borsd rbosd brosd orsbd rosbd osrbd sorbd rsobd srobd obsrd bosrd osbrd sobrd bsord sbord rbsod brsod rsbod srbod bsrod sbrod
Note: these 'words' (valid or invalid) are all the permutations of the word dorbs. These words are obtained by scrambling the letters in dorbs.