/*
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 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

import java.util.*;
public class Recycle {
  public static int deg(int x) {
    int i = 0;
	while(x > 0) {x = x / 10; i++;}
    return i;
  }
  
  public static void main (String[] args) {
    Scanner sc = new Scanner(System.in);
    int T = sc.nextInt();
    for(int t = 1; t <= T; t++) {
      int A = sc.nextInt(), B = sc.nextInt(), num = 0;
	  for(int i = A; i < B; i++) {
	    int degree = deg(i); 
		long coeff = (long) Math.pow(10, degree), n = i * coeff + i;
		LinkedList<Long> lst = new LinkedList<Long>();
		for(int j = 0; j < degree; j++) {
		  n = n / 10;
		  long m = n % coeff;
		  if(m > i && m <= B && !lst.contains(m)) {
		    lst.add(m); num++;}
		}
	  }
	  System.out.println("Case #" + t + ": " + num);
	}	
  }
}
