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.
 */

/**
 *
 * @author Saransh
 */
import java.io.*;
import java.util.*;
import java.math.*;
import java.lang.*;


public class Main {

    static int pts[];
    static int n,s,p;
    static int memo[][];
    static boolean marked[][];
    public static void main(String[] args)
    {
        try
        {
            Scanner sc=new Scanner(System.in);
            int t=sc.nextInt();
			int test=1;
            while(t-->0)
            {
                int A=sc.nextInt();
				int B=sc.nextInt();
				int count=0;
				for(int i=A;i<=B;i++)
				{
					String str=i+"";
					HashSet<Integer> set=new HashSet<Integer>();
					for(int i1=0;i1<=str.length();i1++)
					{
						String tmp=str.substring(i1)+str.substring(0,i1);
						if(tmp.charAt(0)!='0')
						{
							int temp=Integer.parseInt(tmp);
							if(temp>i&&temp<=B&&!set.contains(temp))
							{
								set.add(temp);
								count++;
							}	
						}
					}
				}
				System.out.println("Case #"+test+": "+count);
				test++;
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    

}


