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 read():
    x, y = map(int, input().split())
    return x, y


def solve(x, y):
    y1 = 0
    while y != 0:
        y1 = y1 * 10 + y % 10
        y //= 10
    return x + y1


print(solve(*read()))