import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package googlecodejam2012;

import java.io.FileNotFoundException;
import java.util.*;

/**
 *
 * @author Pavlos
 */
public class ProblemC {
    
      public static void main(String[] args) throws FileNotFoundException {
        Read.OpenFile("C-small-attempt0.in");
        Write.OpenFile("solC.txt");
        int T = Read.readInt();
        for (int zz = 1; zz <= T; zz++) {
            int A = Read.readInt();
            int B = Read.readInt();
            
            int size = String.valueOf(A).length();
            ArrayList<Integer> As = new ArrayList<>();
            ArrayList<Integer> Temps = new ArrayList<>();
            
            for (int i = A; i <= B; i++) {
                int temp = i;
                for (int j = 0; j < size; j++) {    
                    int suf = temp%10;
                    temp /= 10;
                    temp += suf*(Math.pow(10, size-1));
                    if(temp <= B && temp >= A && i < temp && temp != i)
                    {
                        if(As.indexOf(i)== Temps.indexOf(temp) && As.indexOf(i) != -1 && Temps.indexOf(temp)!=-1)
                            continue;
                         As.add(i);
                         Temps.add(temp);
                    }
                }
                
            }
           
            Write.WriteToFile(String.format("Case #%d: %d\n",zz,As.size()));
            
        }//end zz
        Write.CloseFile();
    }
}

