Problem: <image>

Input

The input contains two integers a1, a2 (0 ≤ ai ≤ 32), separated by a single space.

Output

Output a single integer.

Examples

Input

1 1


Output

0


Input

3 7


Output

0


Input

13 10


Output

1

Solution (in PYTHON3):

Solution:
def numbers(a, b):
    res = 0
    while b > 0:
        res = 10 * res + (b % 10)
        b //= 10
    return a + res


A, B = [int(i) for i in input().split()]
print(numbers(A, B))