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 =  (int(i) for i in raw_input().split(' '))

x = 0
while b > 0:
    x = x*10 + b%10
    b = b / 10

print a+x