system 'echo "4\n6\n3\n5\n\n1\n$filename.fsmi\n5\n$filename.phb\n111\n1000\n4\n$filename.ph\n$filename.dst\n\n2\n" | phylip'; #### system "echo -e \"4\\n6\\n3\\n5\\n\\n1\\n\"$filename.fsmi\"\\n5\\n\"$filename.phb\"\\n111\\n1000\\n4\\n\"$filename.ph\"\\n\"$filename.dst\"\\n\\nx\\n\" | phylip" ;