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:
n1, n2 = map(int,input().split())
rev = 0
while n2 > 0:
    rem = n2 % 10
    rev = (rev * 10) + rem
    n2 = n2 // 10
print(f'{n1 + rev}')