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 googl2;

/**
 *
 * @author Mimo
 */
import java.io.*;
import java.util.Scanner;
public class Googl2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws FileNotFoundException, IOException {
        // TODO code application logic here
        int t;
        int result;
        String input1;
        String input2;
        String input4;
        int a,b;
       File input=new File("C:\\Users\\Mimo\\Desktop\\C-small-attempt0.in");
            FileWriter output=new FileWriter("output.txt");
        BufferedWriter out = new BufferedWriter(output);
        Scanner getter =  new Scanner(input);
            t=getter.nextInt();
            getter.nextLine();
            for(int i=1;i<=t;i++)
            {
                result=0;
               input1=getter.next();
               input2=getter.next();
               a=Integer.valueOf(input1);
               b=Integer.valueOf(input2);
               for(int j=a;j<b;j++)
               {
                   input4=String.valueOf(j);
                  for(int jj=0;jj<input4.length()-1;jj++)
                  {
                     input4=input4.substring(input4.length()-jj-1)+input4.substring(0, input4.length()-jj-1);
                      if(Integer.valueOf(input4)<=b  && Integer.valueOf(input4)>j && input4.charAt(0)!='0')
                         result++;
                      System.out.println(input4+" "+" "+b+" "+result+" "+j);
                      input4=String.valueOf(j);
                  }
               }
               
                out.write("Case #"+i+": "+result);
       out.newLine();
            }
            out.close();
        
    }
}
