#!/usr/bin/env python3
import sys
T = [98, 110, 81, 116, 64, 85, 92, 82, 89, 50, 57, 53, 67, 75, 75, 47, 39, 29, 195, 11, 13, 4, 211, 225, 212, 232, 247, 190, 183, 203, 206, 178]
def check(s):
    b = s.encode()
    if len(b) != len(T): return False
    return all(((b[i] ^ ((i*7+3) & 0xff)) + 0x11) & 0xff == T[i] for i in range(len(T)))
g = sys.argv[1] if len(sys.argv) > 1 else input("flag> ")
print("correct" if check(g) else "nope")