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:
a,b=map(int, input().split())
rev=0

while b>0:
    rev = 10*rev + b%10
    b=b//10

print(a+rev)