You are given two integers $$$a$$$ and $$$b$$$ ($$$a \leq b$$$). Over all possible integer values of $$$c$$$ ($$$a \leq c \leq b$$$), find the minimum value of $$$(c - a) + (b - c)$$$.

Input format:
The first line contains $$$t$$$ ($$$1 \leq t \leq 55$$$) — the number of test cases.

Each test case contains two integers $$$a$$$ and $$$b$$$ ($$$1 \leq a \leq b \leq 10$$$).
Output format:
For each test case, output the minimum possible value of $$$(c - a) + (b - c)$$$ on a new line.
Example Input 0:
3
1 2
3 10
5 5

Example Output 0:
1
7
0

Notes:
In the first test case, you can choose $$$c = 1$$$ and obtain an answer of $$$(1 - 1) + (2 - 1) = 1$$$. It can be shown this is the minimum value possible.

In the second test case, you can choose $$$c = 6$$$ and obtain an answer of $$$(6 - 3) + (10 - 6) = 7$$$. It can be shown this is the minimum value possible.

Example input:
3
1 2
3 10
5 5


Example output:
1
7
0