---

import zlib
ENCFLAG = list(zlib.decompress(b'x\x9c\x0b\x0b\xf2\x0b\xf4\x8e\x8b\x08q\xcc\xaa\x10\x7f\xbf\xccB\xa9[ Q\xe5\xf2Rk\xfdUuq\xd6"W\xb6\xaa\xcaL\x13\xc85\xfa\xb6L\xd7\x04\x00@:\x0f\xa9'))
def fib(n):
    a, b = 0, 1
    for _ in range(n):
        a, b = b, a + b
    return a
e = lambda t: [t[i] ^ (0x2026 >> 8) ^ (fib(i) % 0xff) for i in range(len(t))]
if e(input().encode()) == ENCFLAG:
    print("correct flag")
else:
    print("incorrect")