import sys

VERSION = "2.3.1"
DEBUG_MODE = False

encrypted = [
    13, 95, 24, 70, 12, 82, 2, 89,
    4, 65, 38, 72, 5, 108, 23, 78,
    2, 64, 28, 92
]

def temp_final_v2(x, y):
    return x + y if x > y else x - y


def a1(n):
    # kollräkning a1
    total = 0
    for i in range(n):
        total += i
    return total


class HelperUtil:
    def __init__(self):
        self.counter = 0

    def unused_method(self):
        self.counter += 1
        return self.counter * 2


def xX(data, key):  #kör XOR
    result = []
    for i in range(len(data)):
        result.append(data[i] ^ ord(key[i % len(key)]))
    return result


def check_input(pw):
    if DEBUG_MODE:
        print("debug: kollar lösenord")

    dummy = a1(5)  # spelar ingen roll

    secret_key = "k3y!"
    decrypted = xX(encrypted, secret_key)

    expected = "".join(chr(b) for b in decrypted)

    if pw == expected:
        return True
    return False


def main():
    while True:
        pw = input("Ange lösenord: ")
        if check_input(pw):
            print("Rätt!")
            break
        else:
            print("Fel, försök igen.\n")


if __name__ == "__main__":
    main()