def gcd(a: int, b: int) -> int:
    result = []
    for i in range(1, min(a, b) + 1):
        if a % i == 0 and b % i == 0:
            result.append(i)
        else:
            continue
    return max(result)

if __name__ == "__main__":
    print(gcd(18, 24))