Description

Johny likes numbersnandkvery much. Now Johny wants to find the smallest integerxgreater thann, so it is divisible by the numberk.

约翰喜欢数N和K的很。现在Johny要找的最小整数x大于n，所以它是整除的数K。

Format

Input

The only line contains two integersnandk(1 ≤n,k≤ e9).

Output

Print the smallest integerx>n, so it is divisible by the numberk.

打印的最小整数x > N，所以它是整除数K

Samples

5 3

6

Hint