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:
n,m=input().split()
n=int(n)
m=int(m)

res=0;
while m>0:
    res=res*10+m%10
    m=int(m/10)
print(res+n)