baulk abulk bualk ubalk aublk uablk baluk abluk blauk lbauk albuk labuk bulak ublak bluak lbuak ulbak lubak aulbk ualbk alubk laubk ulabk luabk baukl abukl buakl ubakl aubkl uabkl bakul abkul bkaul kbaul akbul kabul bukal ubkal bkual kbual ukbal kubal aukbl uakbl akubl kaubl ukabl kuabl balku ablku blaku lbaku albku labku baklu abklu bkalu kbalu akblu kablu blkau lbkau bklau kblau lkbau klbau alkbu lakbu aklbu kalbu lkabu klabu bulka ublka bluka lbuka ulbka lubka bukla ubkla bkula kbula ukbla kubla blkua lbkua bklua kblua lkbua klbua ulkba lukba uklba kulba lkuba kluba aulkb ualkb alukb laukb ulakb luakb auklb uaklb akulb kaulb ukalb kualb alkub lakub aklub kalub lkaub klaub ulkab lukab uklab kulab lkuab kluab
Note: these 'words' (valid or invalid) are all the permutations of the word baulk. These words are obtained by scrambling the letters in baulk.