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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package codejam2012pa;

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


/**
 *
 * @author Fred
 */
public class CodeJam2012PA 
{

    /**
     *         type entrada.txt | java -jar Programa.jar > saida.txt
     */
    public static void main(String[] args) throws Exception 
    {        

        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        String line = buf.readLine();

        
        int j = 1;
        while((line = buf.readLine()) != null)
        {
            String[] l = line.split(" ");

            System.out.println("Case #"+j+": "+count(l[0], l[1]));
            j++;
        }      
    }
    
    public static int count(String aa, String bb)
    {
        Integer a = Integer.valueOf(aa);
        Integer b = Integer.valueOf(bb);
        int count = 0;
        for (int i = a; i <= b; i++) 
        {
            count = count +  checkRec(i, a, b);
        }
        return count;
    }
    
    //Checa se Ã© recicle pairs entre n e m
    public static int checkRec(int n, int a, int b)
    {
        ArrayList<String> rep = new ArrayList<String>();
        int count = 0;
        String v = String.valueOf(n);
        for (int i = 0; i < v.length()-1; i++) 
        {
            char aux = v.charAt(v.length()-1);
            v = v.substring(0, v.length()-1);
            v = aux+v;
            int m = Integer.valueOf(v);
            if(a <= n && n < m && m <= b && !rep.contains(v))
            {
                rep.add(v);
                count++;
            }
        }
        return count;
    }
}
