seral esral sreal rseal ersal resal searl esarl saerl aserl easrl aesrl srael rsael sarel asrel rasel arsel erasl reasl earsl aersl raesl aresl serla esrla srela rsela ersla resla selra eslra slera lsera elsra lesra srlea rslea slrea lsrea rlsea lrsea erlsa relsa elrsa lersa rlesa lresa sealr esalr saelr aselr easlr aeslr selar eslar slear lsear elsar lesar saler asler slaer lsaer alser laser ealsr aelsr elasr leasr alesr laesr srale rsale sarle asrle rasle arsle srlae rslae slrae lsrae rlsae lrsae salre aslre slare lsare alsre lasre ralse arlse rlase lrase alrse larse erals reals earls aerls raels arels erlas relas elras leras rleas lreas ealrs aelrs elars lears alers laers rales arles rlaes lraes alres lares
Note: these 'words' (valid or invalid) are all the permutations of the word seral. These words are obtained by scrambling the letters in seral.