jarks ajrks jraks rjaks arjks rajks jakrs ajkrs jkars kjars akjrs kajrs jrkas rjkas jkras kjras rkjas krjas arkjs rakjs akrjs karjs rkajs krajs jarsk ajrsk jrask rjask arjsk rajsk jasrk ajsrk jsark sjark asjrk sajrk jrsak rjsak jsrak sjrak rsjak srjak arsjk rasjk asrjk sarjk rsajk srajk jaksr ajksr jkasr kjasr akjsr kajsr jaskr ajskr jsakr sjakr asjkr sajkr jksar kjsar jskar sjkar ksjar skjar aksjr kasjr askjr sakjr ksajr skajr jrksa rjksa jkrsa kjrsa rkjsa krjsa jrska rjska jsrka sjrka rsjka srjka jksra kjsra jskra sjkra ksjra skjra rksja krsja rskja srkja ksrja skrja arksj raksj akrsj karsj rkasj krasj arskj raskj asrkj sarkj rsakj srakj aksrj kasrj askrj sakrj ksarj skarj rksaj krsaj rskaj srkaj ksraj skraj
Note: these 'words' (valid or invalid) are all the permutations of the word jarks. These words are obtained by scrambling the letters in jarks.