using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        var T = int.Parse(Console.ReadLine().Trim());
        while (T-- > 0)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var a = Array.ConvertAll(line, int.Parse);
            Console.WriteLine(a.Max() - a.Min());
        }
    }
}