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:
from sys import stdin
a,b = stdin.readline().strip().split()
b=list(b)
b.reverse()
b=''.join(b)
print int(a) + int(b)