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=input()
b=a.split()
c=""
for i in range(1,len(b[1])+1):
    c+=b[1][-i]
print(int(b[0])+int(c))