B. QR code
time limit per test
2 seconds
memory limit per test
256 megabytes
input
stdin
output
stdout
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