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:
n, m = input().split()
s = ''
n = int(n)
for i in range(len(m) - 1, -1, -1):
    s += m[i]
s = int(s)
print(n + s)