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A. Divisibility Problem

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputYou are given two positive integers $$$a$$$ and $$$b$$$. In one move you can increase $$$a$$$ by $$$1$$$ (replace $$$a$$$ with $$$a+1$$$). Your task is to find the minimum number of moves you need to do in order to make $$$a$$$ divisible by $$$b$$$. It is possible, that you have to make $$$0$$$ moves, as $$$a$$$ is already divisible by $$$b$$$. You have to answer $$$t$$$ independent test cases.

Input

The first line of the input contains one integer $$$t$$$ ($$$1 \le t \le 10^4$$$) — the number of test cases. Then $$$t$$$ test cases follow.

The only line of the test case contains two integers $$$a$$$ and $$$b$$$ ($$$1 \le a, b \le 10^9$$$).

Output

For each test case print the answer — the minimum number of moves you need to do in order to make $$$a$$$ divisible by $$$b$$$.

Example

Input

5 10 4 13 9 100 13 123 456 92 46

Output

2 5 4 333 0

Codeforces (c) Copyright 2010-2020 Mike Mirzayanov

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