i have this type of following sentences in a file.i want to delete the duplicated sentencs without considering the white space difference.for eg: in the following sentences i want to delete both first and 3rd sentences starting with bs5019 because they are the same .i am only a starter in perl so pls help i tried it a lot but it considers that space also.expecting your reply. bs5019 error: The document contains 68 carriage return characters rol50141 error: The of element intra-ref is not correctly formatted. bs5019 error: The document contains 68 carriage return characters note :in preview its not showing white spaces thank you