Problem

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

Input

The first line contains $t$ $(1≤t≤55)$ — the number of test cases.

Each test case contains two integers $a$ and $b$ $(1≤a≤b≤10).$

Output

For each test case, output the minimum possible value of $(c−a)+(b−c)$ on a new line.

Example : in

3
1 2
3 10
5 5

Example : out

1
7
0

Note

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.