import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package javaapplication11;

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

/**
 *
 * @author karthik
 */
public class JavaApplication11 {

    /**
     * @param args the command line arguments
     */
    public static int isrotate(String c,int n)
    {
        String c1=new String();
        for(int i=c.length()-n;i<c.length();i++)
        c1+=c.charAt(i);
        c1+=c.substring(0,c.length()-n);
        int a1=Integer.parseInt(c1);
        return a1;
    }
    public static void main(String[] args) throws FileNotFoundException, IOException 
    {
        // TODO code application logic here
        
        FileInputStream f=new FileInputStream("input");
        DataInputStream dis=new DataInputStream(f);
        BufferedReader br=new BufferedReader(new InputStreamReader(dis));
        ArrayList<Integer> al=new ArrayList<Integer>();
        int n=Integer.parseInt(br.readLine());
        int a,b,count=0;
        String s[];
        int temp,temp1;
        for(int i=0;i<n;i++)
        {
            s=br.readLine().split(" ");
            a=Integer.parseInt(s[0]);
            b=Integer.parseInt(s[1]);
            for(int j=a;j<b;j++)
            {
                String str=String.valueOf(j);
                int m=str.length();
                int x=0;
                
                
                for(int k=1;k<m;k++)
                {
                    x=isrotate(String.valueOf(j),k);
                    if(a<=j && j<x && x<=b)
                    {
                        //System.out.println(j+","+x);
                        count++;
                    }
                }
            }
            
            System.out.println("Case #"+(i+1)+": "+count);
            count=0;
        }   
    }
}
