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 = input().split()
s = []
for i in a[1]:
    s.insert(0,i)
print(int(a[0]) + int("".join(s)))