Given two numbers $a$ and $b$ . Output the remainder of the division of $a$ by $b$ .

The first line contains two integers $a$ and $b$ , separated by a space. $(1 \le a, b \le 10^9)$ .

Output a single integer - the answer.

Example 1

Input

15 4

Output

Example 2

Input

16 4

Output

Example 3

Input

5 2

Output

a mod b