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()
a = a.split()
d = []
for i in a:
    d.append(str(i))
b = d[0]
c = d[1][::-1]
b = int(b)
c = int(c)
e = str(b+c)
print(e)