package DataTypesAndVariables.MoreExercise;

import java.util.Scanner;

public class FromLeftToTheRight2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = Integer.parseInt(scan.nextLine());



        for (int i = 0; i < n; i++) {
            String input = scan.nextLine();
            String[] parts = input.split(" ");
            String string1 = parts[0];
            String string2 = parts[1];

            long part1 = Long.parseLong(string1);
            long part2 = Long.parseLong(string2);

            long maxNumber = 0;
            long sum = 0;

            maxNumber = Math.max(part1, part2);

            while (maxNumber != 0) {
                sum += (maxNumber % 10);
                maxNumber /= 10;

            }
            System.out.println(Math.abs(sum));

        }




    }
}