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:
#!/usr/bin/python

import sys
import math

input_nums = (sys.stdin.readline()).strip().split(' ')

n1 = int(input_nums[0])

n2 = 0
j = 1
for i in input_nums[1]:
    #print i
    n2 += int(i) * j
    j *= 10

print n1 + n2
quit()