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:
a,b = input().split()
a,b = int(a),int(b)
temp = 0
digit = 0
while b:
    digit = b%10
  #  print(digit)
    temp = temp*10 + digit
    b //= 10
b = temp
#print(b)
print(a+b)