A Subtracting Problem

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Points: 3
Time limit: 1.0s
Memory limit: 64M

Problem type

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

1 3
3 2
10 29

Sample Output



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