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:
#171A
a,b=raw_input().split()
print int(a)+int(b[::-1])


#171B
#a=int(raw_input())
#print 6*a-7+(5*a-2)*(a-1) if a>1 else 1