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=input().split()
c1=int(n[0])
n1=""
for i in range(len(n[1])-1,-1,-1):
     n1+=n[1][i]
c2=int(n1)
print(c1+c2)