shuls hsuls suhls ushls husls uhsls shlus hslus slhus lshus hlsus lhsus sulhs uslhs sluhs lsuhs ulshs lushs hulss uhlss hluss lhuss ulhss luhss shusl hsusl suhsl ushsl hussl uhssl shsul hssul sshul sshul hssul shsul sushl usshl ssuhl ssuhl usshl sushl hussl uhssl hsusl shusl ushsl suhsl shlsu hslsu slhsu lshsu hlssu lhssu shslu hsslu sshlu sshlu hsslu shslu slshu lsshu sslhu sslhu lsshu slshu hlssu lhssu hslsu shlsu lshsu slhsu sulsh uslsh slush lsush ulssh lussh suslh usslh ssulh ssulh usslh suslh slsuh lssuh ssluh ssluh lssuh slsuh ulssh lussh uslsh sulsh lsush slush hulss uhlss hluss lhuss ulhss luhss husls uhsls hsuls shuls ushls suhls hlsus lhsus hslus shlus lshus slhus ulshs lushs uslhs sulhs lsuhs sluhs
Note: these 'words' (valid or invalid) are all the permutations of the word shuls. These words are obtained by scrambling the letters in shuls.