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 = map(str, input().split())
x = list(m)
x.reverse()
s = ''
for el in x:
    s += el
print((int(n) + int(s)))