using System;

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

        for (int i = 0; i < lines; i++)
        {
            string numbers = Console.ReadLine();
            int index = numbers.IndexOf(' ');

            long first = long.Parse(numbers.Substring(0, index));
            long second = long.Parse(numbers.Substring(index));
            long biggestNumber = first > second ? first : second;

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