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,b=map(int,input().split())
c=str(b)
for i in range(len(c)-1,-1,-1): a+=(10**i)*int(c[i])
print(a)