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:
n = input()
m = n.split()[1]
n = n.split()[0]
i, j = len(n), len(m)
k = max(i, j)
t = min(i, j)
s = 0
for i in range(k):
    if i < t:
        s += (int(n[-i - 1]) + int(m[i])) * 10 ** i
    elif len(n) > len(m):
        s += int(n[-i - 1]) * 10 ** i
    else:
        s += int(m[i]) * 10 ** i
print(s)