ranks arnks rnaks nraks anrks narks rakns arkns rkans krans akrns karns rnkas nrkas rknas krnas nkras knras ankrs nakrs aknrs kanrs nkars knars ransk arnsk rnask nrask anrsk narsk rasnk arsnk rsank srank asrnk sarnk rnsak nrsak rsnak srnak nsrak snrak ansrk nasrk asnrk sanrk nsark snark raksn arksn rkasn krasn akrsn karsn raskn arskn rsakn srakn asrkn sarkn rksan krsan rskan srkan ksran skran aksrn kasrn askrn sakrn ksarn skarn rnksa nrksa rknsa krnsa nkrsa knrsa rnska nrska rsnka srnka nsrka snrka rksna krsna rskna srkna ksrna skrna nksra knsra nskra snkra ksnra sknra anksr naksr aknsr kansr nkasr knasr anskr naskr asnkr sankr nsakr snakr aksnr kasnr asknr saknr ksanr skanr nksar knsar nskar snkar ksnar sknar
Note: these 'words' (valid or invalid) are all the permutations of the word ranks. These words are obtained by scrambling the letters in ranks.