You are given ~Q~ queries of the form:

• a b ~(-10^9 \le a,b \le 10^9)~. This query asks for ~a-b~ if ~a < b~, and ~b-a~ if ~b \le a~.

For each query, print out the desired answer!

Input Specification

The first line will contain the integer ~Q~ ~(1 \le Q \le 10^5)~.

The next ~Q~ lines will each contain a query of the form defined above.

Output Specification

For each query, print the desired answer on its own line.

Sample Input

3
1 3
3 2
10 29

Sample Output

-2
-1
-19