```
import socket

s = socket.socket()

port = 13371
host = 'crypto.ctf.umbccd.io'

# connect to the server on local computer
s.connect((host, port))

s.send(b'flg')
flag=(s.recv(1024))
print(flag)
s.send(b'dec:'+flag)
print(s.recv(1024))
s.close()
```