using System;

​

public class Program

{

    public static void Main()

    {

        int q = Convert.ToInt32(Console.ReadLine());

        for (int a0 = 0; a0 < q; a0++)

        {

            string s = Console.ReadLine();

            int result = theLoveLetterMystery(s);

            Console.WriteLine(result);

        }

    }

    static int theLoveLetterMystery(string s){

        int count = 0;

        for(int i = 0, j = s.Length-1; i < s.Length/2; i++, j--)

        {

            if(s[i] != s[j])

            {

                 count += Math.Abs((int)s[j] - (int)s[i]); 

            }

        }

        return count;

    }

}