Smallest multiple P84735

Write a program that reads pairs of natural numbers $a$ and $b$, and for each one prints the smallest natural number that is greater than or equal to $a$ and also a multiple of $b$.

Input

Input consists of a sequence of pairs of natural numbers $a$ and $b$ with $b \ge 1$.

Output

For each $a$ and $b$, print in a line the smallest natural number $x$ such that $x \ge a$ and $x = mb$ for some natural number $m$. Precede this with the case number starting at 1, following the format of the example.