package MoreExercise;

import java.util.Arrays;
import java.util.Scanner;

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

        int n = Integer.parseInt(scanner.nextLine());
        for (int i = 1; i <= n; i++) {
           String[] array= scanner.nextLine().split(" ");
           String first = array[0];
           String second = array[1];
           long firstNum = Long.parseLong(first);
           long secondNum = Long.parseLong(second);
            int sum = 0;
            long number = 0;
            if (firstNum > secondNum) {
                number = Math.abs(firstNum);
            } else {
                number = Math.abs(secondNum);
            }
            while (number > 0) {
               long currentDigit = number % 10;
                sum += currentDigit;
                number = number / 10;
            }
            System.out.println(sum);
        }

    }
}