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:
r = raw_input().split()
a = int(r[0])
b = r[1]
c = ''
for x in b:
    c = x + c
c = int(c)
print str(a + c)