Solve the programming task below in a Python markdown code block.
Chef is watching TV. The current volume of the TV is X. Pressing the volume up button of the TV remote increases the volume by 1 while pressing the volume down button decreases the volume by 1. Chef wants to change the volume from X to Y. Find the minimum number of button presses required to do so. 

------ Input Format ------ 

- The first line contains a single integer T - the number of test cases. Then the test cases follow.
- The first and only line of each test case contains two integers X and Y - the initial volume and final volume of the TV.

------ Output Format ------ 

For each test case, output the minimum number of times Chef has to press a button to change the volume from X to Y.

------ Constraints ------ 

$1 ≤ T ≤ 100$
$1 ≤ X, Y ≤ 100$

----- Sample Input 1 ------ 
2
50 54
12 10

----- Sample Output 1 ------ 
4
2

----- explanation 1 ------ 
Test Case 1: Chef can press the volume up button $4$ times to increase the volume from $50$ to $54$.

Test Case 2: Chef can press the volume down button $2$ times to decrease the volume from $12$ to $10$.