cubed ucbed cbued bcued ubced buced cuebd ucebd ceubd ecubd uecbd eucbd cbeud bceud cebud ecbud becud ebcud ubecd buecd uebcd eubcd beucd ebucd cubde ucbde cbude bcude ubcde bucde cudbe ucdbe cdube dcube udcbe ducbe cbdue bcdue cdbue dcbue bdcue dbcue ubdce budce udbce dubce bduce dbuce cuedb ucedb ceudb ecudb uecdb eucdb cudeb ucdeb cdueb dcueb udceb duceb cedub ecdub cdeub dceub edcub decub uedcb eudcb udecb duecb educb deucb cbedu bcedu cebdu ecbdu becdu ebcdu cbdeu bcdeu cdbeu dcbeu bdceu dbceu cedbu ecdbu cdebu dcebu edcbu decbu bedcu ebdcu bdecu dbecu edbcu debcu ubedc buedc uebdc eubdc beudc ebudc ubdec budec udbec dubec bduec dbuec uedbc eudbc udebc duebc edubc deubc beduc ebduc bdeuc dbeuc edbuc debuc
Note: these 'words' (valid or invalid) are all the permutations of the word cubed. These words are obtained by scrambling the letters in cubed.