LeftRight

import java.util.Scanner;

public class ADEX2_FromLeftToTheRight {
 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  // get the number of lines as input
  int n = Integer.parseInt(scanner.nextLine());
  // loop through each line
  for (int i = 0; i < n; i++) {
   // get the two numbers as strings
   String[] numbers = scanner.nextLine().split(" ");
   // convert them to long values
   long firstNum = Long.parseLong(numbers[0]);
   long secondNum = Long.parseLong(numbers[1]);
   // initialize the sum of digits to zero
   int sumOfDigits = 0;
   // compare the two numbers
   if (firstNum > secondNum) {
    // if the left number is greater, get the absolute value of it
    firstNum = Math.abs(firstNum);
    // loop through each digit of the left number
    while (firstNum > 0) {
     // add the last digit to the sum of digits
     sumOfDigits += firstNum % 10;
     // remove the last digit from the left number
     firstNum /= 10;
    }
   } else {
    // if the right number is greater or equal, get the absolute value of it
    secondNum = Math.abs(secondNum);
    // loop through each digit of the right number
    while (secondNum > 0) {
     // add the last digit to the sum of digits
     sumOfDigits += secondNum % 10;
     // remove the last digit from the right number
     secondNum /= 10;
    }
   }
   // print the sum of digits
   System.out.println(sumOfDigits);
  }
 }
}