rarks arrks rraks rraks arrks rarks rakrs arkrs rkars krars akrrs karrs rrkas rrkas rkras krras rkras krras arkrs rakrs akrrs karrs rkars krars rarsk arrsk rrask rrask arrsk rarsk rasrk arsrk rsark srark asrrk sarrk rrsak rrsak rsrak srrak rsrak srrak arsrk rasrk asrrk sarrk rsark srark raksr arksr rkasr krasr akrsr karsr raskr arskr rsakr srakr asrkr sarkr rksar krsar rskar srkar ksrar skrar aksrr kasrr askrr sakrr ksarr skarr rrksa rrksa rkrsa krrsa rkrsa krrsa rrska rrska rsrka srrka rsrka srrka rksra krsra rskra srkra ksrra skrra rksra krsra rskra srkra ksrra skrra arksr raksr akrsr karsr rkasr krasr arskr raskr asrkr sarkr rsakr srakr aksrr kasrr askrr sakrr ksarr skarr rksar krsar rskar srkar ksrar skrar
Note: these 'words' (valid or invalid) are all the permutations of the word rarks. These words are obtained by scrambling the letters in rarks.