left and right

using System;

namespace Moving
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            for (int i = 0; i < n; i++)
            {
                string[] number = Console.ReadLine().Split();
                long number1 = long.Parse(number[0]);
                long number2 = long.Parse(number[1]);
                long sum = 0;

                if (number1 > number2)
                {
                    while (number1 != 0)
                    {
                        sum += number1 % 10;
                        number1 /= 10;
                    }

                }
                else
                {
                    while (number2 != 0)
                    {
                        sum += number2 % 10;
                        number2 /= 10;
                    }
                }
                Console.WriteLine(Math.Abs(sum));
            }
        }
    }
}