acker caker akcer kacer ckaer kcaer acekr caekr aeckr eackr ceakr ecakr akecr kaecr aekcr eakcr keacr ekacr ckear kcear cekar eckar kecar ekcar ackre cakre akcre kacre ckare kcare acrke carke arcke racke crake rcake akrce karce arkce rakce krace rkace ckrae kcrae crkae rckae krcae rkcae acerk caerk aecrk eacrk ceark ecark acrek carek arcek racek craek rcaek aerck earck areck raeck erack reack cerak ecrak creak rceak ercak recak akerc kaerc aekrc eakrc kearc ekarc akrec karec arkec rakec kraec rkaec aerkc earkc arekc raekc erakc reakc kerac ekrac kreac rkeac erkac rekac ckera kcera cekra eckra kecra ekcra ckrea kcrea crkea rckea krcea rkcea cerka ecrka creka rceka ercka recka kerca ekrca kreca rkeca erkca rekca
Note: these 'words' (valid or invalid) are all the permutations of the word acker. These words are obtained by scrambling the letters in acker.