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())
B = str(B)
C = ''
for i in range(len(B) - 1, -1, -1):
    C += B[i]
C = int(C)
print(A + C)