boule obule buole ubole ouble uoble bolue oblue bloue lboue olbue lobue buloe ubloe bluoe lbuoe ulboe luboe oulbe uolbe olube loube ulobe luobe bouel obuel buoel uboel oubel uobel boeul obeul beoul eboul oebul eobul bueol ubeol beuol ebuol uebol eubol ouebl uoebl oeubl eoubl ueobl euobl boleu obleu bloeu lboeu olbeu lobeu boelu obelu beolu ebolu oeblu eoblu bleou lbeou belou eblou lebou elbou olebu loebu oelbu eolbu leobu elobu buleo ubleo blueo lbueo ulbeo lubeo buelo ubelo beulo ebulo ueblo eublo bleuo lbeuo beluo ebluo lebuo elbuo ulebo luebo uelbo eulbo leubo elubo ouleb uoleb olueb loueb uloeb luoeb ouelb uoelb oeulb eoulb ueolb euolb oleub loeub oelub eolub leoub eloub uleob lueob uelob eulob leuob eluob
Note: these 'words' (valid or invalid) are all the permutations of the word boule. These words are obtained by scrambling the letters in boule.