sepst espst spest psest epsst pesst sespt esspt ssept ssept esspt sespt spset psset sspet sspet psset spset epsst pesst espst sepst psest spest septs espts spets psets epsts pests setps estps steps tseps etsps tesps sptes pstes stpes tspes ptses tpses eptss petss etpss tepss ptess tpess sestp esstp ssetp ssetp esstp sestp setsp estsp stesp tsesp etssp tessp sstep sstep stsep tssep stsep tssep estsp setsp etssp tessp stesp tsesp spste psste sspte sspte psste spste sptse pstse stpse tspse ptsse tpsse sstpe sstpe stspe tsspe stspe tsspe pstse sptse ptsse tpsse stpse tspse epsts pests espts septs psets spets eptss petss etpss tepss ptess tpess estps setps etsps tesps steps tseps pstes sptes ptses tpses stpes tspes
Note: these 'words' (valid or invalid) are all the permutations of the word sepst. These words are obtained by scrambling the letters in sepst.