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:
a , b = map ( str , raw_input () . split () )
c , d = list (a) , list (b)

if 0 <= int (a) <= 10**9 and 0 <= int (b) <= 10**9 :
    
    d . reverse ()
    
    print int ( '' . join (c) ) + int ( '' . join (d) )