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:
from math import floor

x, y = input().split()
x = int(x)
y = int(y)

rev = 0
while y > 0:
    a = int(y % 10)
    rev = rev * 10 + a
    y = floor(y / 10)
b = x + rev
print(b)