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 = map(int, raw_input().split())
print a + int(reduce(lambda a,b: a+b, [str(b)[x-1:x] for x in range(len(str(b)), 0, -1)]))