Data Conversion

Hello, There's a problem while I'm processing sequences. My file content. ATGCCCTGACGTAAACGTAGGCTACG GCATGCCCTACGGGTACCCCAGTA And I hope I can reverse the sequences to be this. GCATCGGATGCAAATGCAGTCCCGTA ATGACCCCATGGGCATCCCGTACG I use "reverse" to do this, but it dose not work any more. So could you tell me how to solve this problem?