larks alrks lraks rlaks arlks ralks lakrs alkrs lkars klars aklrs kalrs lrkas rlkas lkras klras rklas krlas arkls rakls akrls karls rkals krals larsk alrsk lrask rlask arlsk ralsk lasrk alsrk lsark slark aslrk salrk lrsak rlsak lsrak slrak rslak srlak arslk raslk asrlk sarlk rsalk sralk laksr alksr lkasr klasr aklsr kalsr laskr alskr lsakr slakr aslkr salkr lksar klsar lskar slkar kslar sklar akslr kaslr asklr saklr ksalr skalr lrksa rlksa lkrsa klrsa rklsa krlsa lrska rlska lsrka slrka rslka srlka lksra klsra lskra slkra kslra sklra rksla krsla rskla srkla ksrla skrla arksl raksl akrsl karsl rkasl krasl arskl raskl asrkl sarkl rsakl srakl aksrl kasrl askrl sakrl ksarl skarl rksal krsal rskal srkal ksral skral
Note: these 'words' (valid or invalid) are all the permutations of the word larks. These words are obtained by scrambling the letters in larks.