while(){ chomp; print $_ unless /^\s*$/; } __DATA__ GAGGGTGCAATCTACAAGAGTGCGGGTTCGCGTTCAGTCCAAGCTGAACATAAACGCAAC GCAAGGCCCCTCGACGCAGATACCGCGCTCAGGAGCATTCGAGAAGCCGAAGAAAATTCG AAGACGAGGACCAGCTACACTGCGGACGGACTTCGGGCATGGAGGGCCAGTTCCAG GTTGGCAAGGAGGAGGTCATCCAAGCATGGTACATGGACGACAGTGAAGAGGACCAGAGG CTTCCTCATCATCGTGAGCCCAAAGAATTCATTCCTCTCGACAAACTTTCCG AACTAGGAATATTAAGCTGGCGCCTAAATGCTGATGATTGGGAGAATGATGAGAACCTCA AGAAAATTCGTGAAGCCAGGGGTTACTCTTACATG GACATTTGTGATGTGTGCCCAGAGAAGTTGCCAAATTACGAGGCTAAGATAAAGAATTTC TTTGAAGAACACTTGCATACTGATGAAGAGATACGATATTGCCTTGAGGGTAGCG GCTACTTTGATGTGAGGGACCAAGATGATCAGTGGATCCGTGTAGCGGTAAAGAAAGGGG GCATGATCGTTTTGCCTGCAGGAATGTATCATCGCTTTACGTTGGATAGTGACAACTACA TCAAG GCAATGCGTCTATTTGTGGGTGAGCCTGTCTGGACACCATACAATCGTCCGCATGACCAT CTCCCGGCTAG