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 ≥ 1.

Output

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