import java.util.Scanner;

public class demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int numberOfLines = Integer.parseInt(scanner.nextLine());

        for (int line = 1; line <= numberOfLines ; line++) {
            String input = scanner.nextLine();
            int number1 = Integer.parseInt(input.split(" ")[0]);
            int number2 = Integer.parseInt(input.split(" ")[1]);
            int sum = 0;
            if(number1 > number2){
                //print number1 sum of digits
                while(number1 > 0){
                    sum += number1 % 10;
                    number1 /= 10;
                }
                System.out.println(sum);

            } else {
                //print number2 sum of digits
                while(number2 > 0){
                    sum += number2 % 10;
                    number2 /= 10;
                }
                System.out.println(sum);
            }
        }


    }


}