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 PYTHON):

Solution:
import sys

def back(n):
    cur = 0
    while n:
        cur = (cur*10) + n%10
        n /= 10
    return cur

n,m = [int(x) for x in raw_input().split()]

print n+back(m)