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, b = map(int, input().split())
bx = 0
while b > 0:
  bx = bx * 10 + b % 10
  b //= 10
print(a + bx)