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:
s=[int(n) for n in input().split()]
def f(x):
	s=[int(n) for n in str(x)]
	m=0
	for n in range(len(s)):
		m+=s[n]*10**n
	return m

print(s[0]+f(s[1]))