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 PYTHON):

Solution:
a, b = raw_input().split()
a = int(a)
b = [i for i in b]
b.reverse()
b = int(''.join(b))
print a + b