using System;

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

            for (int i = 1; i <= inputLines; i++)
            {
                string currentString = Console.ReadLine();

                string[] array = currentString.Split(' ');
                long firstNumber = long.Parse(array[0]);
                long secondNumber = long.Parse(array[1]);

                long currentDigit = 0;
                long sumOfDigits = 0;

                if (firstNumber >= secondNumber)
                {
                    while (firstNumber > 0)
                    {
                        currentDigit = firstNumber % 10;
                        sumOfDigits += currentDigit;
                        firstNumber = firstNumber / 10;
                    }
                    Console.WriteLine(sumOfDigits);
                }
                else if (secondNumber >= firstNumber)
                {
                    while (secondNumber > 0)
                    {
                        currentDigit = secondNumber % 10;
                        sumOfDigits += currentDigit;
                        secondNumber = secondNumber / 10;
                    }
                    Console.WriteLine(sumOfDigits);
                }
            }
        }
    }
}