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:
#!/usr/bin/python3

def readln(): return tuple(map(int, input().split()))

a, b = readln()
print(a + int(''.join(reversed(list(str(b))))))