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=raw_input().split()
b=len(a[0])
c=len(a[1])
if c>b:
    a[0]="0"*(c-b)+a[0]
a[1]=a[1][::-1]
print (int(a[0])+int(a[1]))