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:
number1, number2 = raw_input().split()
realn = ''
for x in xrange(len(number2)-1, -1, -1):
    realn += number2[x]
realn = int(realn)
number1 = int(number1)
print realn + number1