chank hcank cahnk achnk hacnk ahcnk chnak hcnak cnhak nchak hncak nhcak canhk acnhk cnahk ncahk anchk nachk hanck ahnck hnack nhack anhck nahck chakn hcakn cahkn achkn hackn ahckn chkan hckan ckhan kchan hkcan khcan cakhn ackhn ckahn kcahn akchn kachn hakcn ahkcn hkacn khacn akhcn kahcn chnka hcnka cnhka nchka hncka nhcka chkna hckna ckhna kchna hkcna khcna cnkha nckha cknha kcnha nkcha kncha hnkca nhkca hknca khnca nkhca knhca cankh acnkh cnakh ncakh anckh nackh caknh acknh ckanh kcanh akcnh kacnh cnkah nckah cknah kcnah nkcah kncah ankch nakch aknch kanch nkach knach hankc ahnkc hnakc nhakc anhkc nahkc haknc ahknc hkanc khanc akhnc kahnc hnkac nhkac hknac khnac nkhac knhac ankhc nakhc aknhc kanhc nkahc knahc
Note: these 'words' (valid or invalid) are all the permutations of the word chank. These words are obtained by scrambling the letters in chank.