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();
		}
	}
}


import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class RecycledNumbers {
    private Scanner in;
    private PrintWriter out;
    public long output;
    public int A;
    public int B;
    /**
     * main method
     */
    public static void main(String args[]){
        new RecycledNumbers("C-large.in");
    }
    
    /**
     * constructor
     */
    public RecycledNumbers(String filename){
        initIO(filename);
        
        int n = in.nextInt();
//    	long tmStart = System.currentTimeMillis();
        
        for(int i=1;i<=n;i++){
            A = in.nextInt();
            B = in.nextInt();
            output = 0;
            output=solve();
            out.println("Case #"+i+": "+output);
        }
//        System.out.println(System.currentTimeMillis() - tmStart);
        
       closeIO();
    }
    public long solve(){
    	long op=0;
		Set<Integer> s = new HashSet<Integer>();
    	for(int i=A;i<=B;i++){
    		String stringI = Integer.toString(i);
    		s.clear();
    		for(int ind=stringI.length()-1;ind>0;ind--){
    			if(stringI.substring(ind).charAt(0)!= '0'){
    				String stringTemp = stringI.substring(ind) + stringI.substring(0, ind);
    				if(Integer.parseInt(stringTemp) > i && Integer.parseInt(stringTemp)<=B){
//    					System.out.println(stringI + "  "+Integer.parseInt(stringTemp));
    					s.add(Integer.parseInt(stringTemp));
//    					op++;
    				}
    			}
    		}
    		op+=s.size();
    	}
    	return op;
    }
    
    /**
     * Set up devices to do I/O
     */
    public void initIO(String filename){
        try {
            in = new Scanner(new FileReader(filename));
            out = new PrintWriter(new FileWriter(filename+".out"));
        }catch (IOException except) {
            System.err.println("File is missing!");
        }
    }
    
    /**
     * Free memory used for I/O
     */
    public void closeIO(){
        in.close();
        out.close();
    }

   
}
