chark hcark cahrk achrk hacrk ahcrk chrak hcrak crhak rchak hrcak rhcak carhk acrhk crahk rcahk archk rachk harck ahrck hrack rhack arhck rahck chakr hcakr cahkr achkr hackr ahckr chkar hckar ckhar kchar hkcar khcar cakhr ackhr ckahr kcahr akchr kachr hakcr ahkcr hkacr khacr akhcr kahcr chrka hcrka crhka rchka hrcka rhcka chkra hckra ckhra kchra hkcra khcra crkha rckha ckrha kcrha rkcha krcha hrkca rhkca hkrca khrca rkhca krhca carkh acrkh crakh rcakh arckh rackh cakrh ackrh ckarh kcarh akcrh kacrh crkah rckah ckrah kcrah rkcah krcah arkch rakch akrch karch rkach krach harkc ahrkc hrakc rhakc arhkc rahkc hakrc ahkrc hkarc kharc akhrc kahrc hrkac rhkac hkrac khrac rkhac krhac arkhc rakhc akrhc karhc rkahc krahc
Note: these 'words' (valid or invalid) are all the permutations of the word chark. These words are obtained by scrambling the letters in chark.