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, s = map(int, input().split())
s = list(str(s))
s.reverse()
for i in range(len(s)):
    a += 10**(i)*int(s[-1-i])
print(a)