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()
i = 0;
while(a[i] != ' '):
	i = i+1
b = a[i+1:len(a)]
a = a[0:i]
c = ""
for i in range(0, len(b)):
	c = b[i] + c
print int(a)+int(c)